Algebra and Trigonometry: Structure and Method, Book 2
Algebra and Trigonometry: Structure and Method, Book 2
2000th Edition
ISBN: 9780395977255
Author: MCDOUGAL LITTEL
Publisher: McDougal Littell
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Chapter 10.5, Problem 2MRE
To determine

To Solve:

  x37x+6=0

Expert Solution & Answer
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Answer to Problem 2MRE

The roots of the equation are 1, 2, -3.

Explanation of Solution

Given:

The equation is :

  x37x+6=0

Formula Used:

The cubic equation ax3+bx2+cx+d=0 has roots p, q ,r ; then ,

  p+q+r=ba

  pq+qr+pr=ca

  pqr=da

Calculation:

Comparing the given equation with the standard cubic equation ax3+bx2+cx+d=0 ,we have:

a = 1, b = 0, c = -7 , d = 6

Since the equation is cubic, it has 3 roots.

Let the roots are p, q, r.

Use the da method to find the roots of the equation.

Since product of the roots = pqr =da=6...........(1) , the roots of the equation can be ±1,±2,±3 .

  p+q+r=ba=0.............(2)

As x = 1 satisfies the equation:

  x37x+6=0 (1) 3 7(1)+6=0

So, p = 1 is a root of the equation.

Substitute the value of p = 1 in the equations (1) and (2):

  (1)qr=6qr=61+q+r=0q+r=1

Solve the equations:

  q+r=1q=1randqr=6(1r)r=6(1+r)r=6...................[multiply by -1 each side]r2+r6=0................[subtract 6 each side]r2+3r2r6=0.......[factor the middle term]r(r+3)2(r+3)=0(r+3)(r2)=0r=3   or   r=2..........[ab=0a=0  or  b=0]q=1(3)   or   q=12...[q=1r]q=2   or   q=3

So, the roots of the equation are 1, 2, -3.

Chapter 10 Solutions

Algebra and Trigonometry: Structure and Method, Book 2

Ch. 10.1 - Prob. 11OECh. 10.1 - Prob. 12OECh. 10.1 - Prob. 13OECh. 10.1 - Prob. 14OECh. 10.1 - Prob. 15OECh. 10.1 - Prob. 16OECh. 10.1 - Prob. 17OECh. 10.1 - Prob. 18OECh. 10.1 - Prob. 19OECh. 10.1 - Prob. 20OECh. 10.1 - Prob. 21OECh. 10.1 - Prob. 22OECh. 10.1 - Prob. 23OECh. 10.1 - Prob. 24OECh. 10.1 - Prob. 25OECh. 10.1 - Prob. 26OECh. 10.1 - Prob. 27OECh. 10.1 - Prob. 28OECh. 10.1 - Prob. 29OECh. 10.1 - Prob. 30OECh. 10.1 - Prob. 31OECh. 10.1 - Prob. 1WECh. 10.1 - Prob. 2WECh. 10.1 - Prob. 3WECh. 10.1 - Prob. 4WECh. 10.1 - Prob. 5WECh. 10.1 - Prob. 6WECh. 10.1 - Prob. 7WECh. 10.1 - Prob. 8WECh. 10.1 - Prob. 9WECh. 10.1 - Prob. 10WECh. 10.1 - Prob. 11WECh. 10.1 - Prob. 12WECh. 10.1 - Prob. 13WECh. 10.1 - Prob. 14WECh. 10.1 - Prob. 15WECh. 10.1 - Prob. 16WECh. 10.1 - Prob. 17WECh. 10.1 - Prob. 18WECh. 10.1 - Prob. 19WECh. 10.1 - Prob. 20WECh. 10.1 - Prob. 21WECh. 10.1 - Prob. 22WECh. 10.1 - Prob. 23WECh. 10.1 - Prob. 24WECh. 10.1 - Prob. 25WECh. 10.1 - Prob. 26WECh. 10.1 - Prob. 27WECh. 10.1 - Prob. 28WECh. 10.1 - Prob. 29WECh. 10.1 - Prob. 30WECh. 10.1 - Prob. 31WECh. 10.1 - Prob. 32WECh. 10.1 - Prob. 33WECh. 10.1 - Prob. 34WECh. 10.1 - Prob. 35WECh. 10.1 - Prob. 36WECh. 10.1 - Prob. 37WECh. 10.1 - Prob. 38WECh. 10.1 - Prob. 39WECh. 10.1 - Prob. 40WECh. 10.1 - Prob. 41WECh. 10.1 - Prob. 42WECh. 10.1 - Prob. 43WECh. 10.1 - Prob. 44WECh. 10.1 - Prob. 45WECh. 10.1 - Prob. 46WECh. 10.1 - Prob. 47WECh. 10.1 - Prob. 48WECh. 10.1 - Prob. 49WECh. 10.1 - Prob. 50WECh. 10.1 - Prob. 1MRECh. 10.1 - Prob. 2MRECh. 10.1 - Prob. 3MRECh. 10.1 - Prob. 4MRECh. 10.1 - Prob. 5MRECh. 10.1 - Prob. 6MRECh. 10.2 - Prob. 1OECh. 10.2 - Prob. 2OECh. 10.2 - Prob. 3OECh. 10.2 - Prob. 4OECh. 10.2 - Prob. 5OECh. 10.2 - Prob. 6OECh. 10.2 - Prob. 7OECh. 10.2 - Prob. 8OECh. 10.2 - Prob. 9OECh. 10.2 - Prob. 10OECh. 10.2 - Prob. 11OECh. 10.2 - Prob. 12OECh. 10.2 - Prob. 1WECh. 10.2 - Prob. 2WECh. 10.2 - Prob. 3WECh. 10.2 - Prob. 4WECh. 10.2 - Prob. 5WECh. 10.2 - Prob. 6WECh. 10.2 - Prob. 7WECh. 10.2 - Prob. 8WECh. 10.2 - Prob. 9WECh. 10.2 - Prob. 10WECh. 10.2 - Prob. 11WECh. 10.2 - Prob. 12WECh. 10.2 - Prob. 13WECh. 10.2 - Prob. 14WECh. 10.2 - Prob. 15WECh. 10.2 - Prob. 16WECh. 10.2 - Prob. 17WECh. 10.2 - Prob. 18WECh. 10.2 - Prob. 19WECh. 10.2 - Prob. 20WECh. 10.2 - Prob. 21WECh. 10.2 - Prob. 22WECh. 10.2 - Prob. 23WECh. 10.2 - Prob. 24WECh. 10.2 - Prob. 25WECh. 10.2 - Prob. 26WECh. 10.2 - Prob. 27WECh. 10.2 - Prob. 28WECh. 10.2 - Prob. 29WECh. 10.2 - Prob. 30WECh. 10.2 - Prob. 31WECh. 10.2 - Prob. 32WECh. 10.2 - Prob. 33WECh. 10.2 - Prob. 34WECh. 10.2 - Prob. 35WECh. 10.2 - Prob. 36WECh. 10.2 - Prob. 37WECh. 10.2 - Prob. 38WECh. 10.2 - Prob. 39WECh. 10.3 - Prob. 1OECh. 10.3 - Prob. 2OECh. 10.3 - Prob. 3OECh. 10.3 - Prob. 4OECh. 10.3 - Prob. 5OECh. 10.3 - Prob. 6OECh. 10.3 - Prob. 7OECh. 10.3 - Prob. 1WECh. 10.3 - Prob. 2WECh. 10.3 - Prob. 3WECh. 10.3 - Prob. 4WECh. 10.3 - Prob. 5WECh. 10.3 - Prob. 6WECh. 10.3 - Prob. 7WECh. 10.3 - Prob. 8WECh. 10.3 - Prob. 9WECh. 10.3 - Prob. 10WECh. 10.3 - Prob. 11WECh. 10.3 - Prob. 12WECh. 10.3 - Prob. 13WECh. 10.3 - Prob. 14WECh. 10.3 - Prob. 15WECh. 10.3 - Prob. 16WECh. 10.3 - Prob. 17WECh. 10.3 - Prob. 18WECh. 10.3 - Prob. 19WECh. 10.3 - Prob. 20WECh. 10.3 - Prob. 21WECh. 10.3 - Prob. 22WECh. 10.3 - Prob. 23WECh. 10.3 - Prob. 24WECh. 10.3 - Prob. 25WECh. 10.3 - Prob. 26WECh. 10.3 - Prob. 1MRECh. 10.3 - Prob. 2MRECh. 10.3 - Prob. 3MRECh. 10.3 - Prob. 4MRECh. 10.3 - Prob. 5MRECh. 10.3 - Prob. 6MRECh. 10.3 - Prob. 7MRECh. 10.3 - Prob. 8MRECh. 10.3 - Prob. 9MRECh. 10.3 - Prob. 10MRECh. 10.3 - Prob. 11MRECh. 10.3 - Prob. 12MRECh. 10.3 - Prob. 1STCh. 10.3 - Prob. 2STCh. 10.3 - Prob. 3STCh. 10.3 - Prob. 4STCh. 10.3 - Prob. 5STCh. 10.3 - Prob. 6STCh. 10.3 - Prob. 7STCh. 10.4 - Prob. 1OECh. 10.4 - Prob. 2OECh. 10.4 - Prob. 3OECh. 10.4 - Prob. 4OECh. 10.4 - Prob. 5OECh. 10.4 - Prob. 6OECh. 10.4 - Prob. 7OECh. 10.4 - Prob. 8OECh. 10.4 - Prob. 9OECh. 10.4 - Prob. 10OECh. 10.4 - Prob. 11OECh. 10.4 - Prob. 12OECh. 10.4 - Prob. 13OECh. 10.4 - Prob. 14OECh. 10.4 - Prob. 15OECh. 10.4 - Prob. 16OECh. 10.4 - Prob. 17OECh. 10.4 - Prob. 18OECh. 10.4 - Prob. 19OECh. 10.4 - Prob. 20OECh. 10.4 - Prob. 1WECh. 10.4 - Prob. 2WECh. 10.4 - Prob. 3WECh. 10.4 - Prob. 4WECh. 10.4 - Prob. 5WECh. 10.4 - Prob. 6WECh. 10.4 - Prob. 7WECh. 10.4 - Prob. 8WECh. 10.4 - Prob. 9WECh. 10.4 - Prob. 10WECh. 10.4 - Prob. 11WECh. 10.4 - Prob. 12WECh. 10.4 - Prob. 13WECh. 10.4 - Prob. 14WECh. 10.4 - Prob. 15WECh. 10.4 - Prob. 16WECh. 10.4 - Prob. 17WECh. 10.4 - Prob. 18WECh. 10.4 - Prob. 19WECh. 10.4 - Prob. 20WECh. 10.4 - Prob. 21WECh. 10.4 - Prob. 22WECh. 10.4 - Prob. 23WECh. 10.4 - Prob. 24WECh. 10.4 - Prob. 25WECh. 10.4 - Prob. 26WECh. 10.4 - Prob. 27WECh. 10.4 - Prob. 28WECh. 10.4 - Prob. 29WECh. 10.4 - Prob. 30WECh. 10.4 - Prob. 31WECh. 10.4 - Prob. 32WECh. 10.4 - Prob. 33WECh. 10.4 - Prob. 34WECh. 10.4 - Prob. 35WECh. 10.4 - Prob. 36WECh. 10.4 - Prob. 37WECh. 10.4 - Prob. 38WECh. 10.4 - Prob. 39WECh. 10.4 - Prob. 40WECh. 10.4 - Prob. 41WECh. 10.4 - Prob. 42WECh. 10.4 - Prob. 43WECh. 10.5 - Prob. 1OECh. 10.5 - Prob. 2OECh. 10.5 - Prob. 3OECh. 10.5 - Prob. 4OECh. 10.5 - Prob. 5OECh. 10.5 - Prob. 6OECh. 10.5 - Prob. 7OECh. 10.5 - Prob. 8OECh. 10.5 - Prob. 9OECh. 10.5 - Prob. 10OECh. 10.5 - Prob. 11OECh. 10.5 - Prob. 12OECh. 10.5 - Prob. 13OECh. 10.5 - Prob. 14OECh. 10.5 - Prob. 15OECh. 10.5 - Prob. 16OECh. 10.5 - Prob. 17OECh. 10.5 - Prob. 18OECh. 10.5 - Prob. 19OECh. 10.5 - Prob. 20OECh. 10.5 - Prob. 21OECh. 10.5 - Prob. 22OECh. 10.5 - Prob. 23OECh. 10.5 - Prob. 24OECh. 10.5 - Prob. 1WECh. 10.5 - Prob. 2WECh. 10.5 - Prob. 3WECh. 10.5 - Prob. 4WECh. 10.5 - Prob. 5WECh. 10.5 - Prob. 6WECh. 10.5 - Prob. 7WECh. 10.5 - Prob. 8WECh. 10.5 - Prob. 9WECh. 10.5 - Prob. 10WECh. 10.5 - Prob. 11WECh. 10.5 - Prob. 12WECh. 10.5 - Prob. 13WECh. 10.5 - Prob. 14WECh. 10.5 - Prob. 15WECh. 10.5 - Prob. 16WECh. 10.5 - Prob. 17WECh. 10.5 - Prob. 18WECh. 10.5 - Prob. 19WECh. 10.5 - Prob. 20WECh. 10.5 - Prob. 21WECh. 10.5 - Prob. 22WECh. 10.5 - Prob. 23WECh. 10.5 - Prob. 24WECh. 10.5 - Prob. 25WECh. 10.5 - Prob. 26WECh. 10.5 - Prob. 27WECh. 10.5 - Prob. 28WECh. 10.5 - Prob. 29WECh. 10.5 - Prob. 30WECh. 10.5 - Prob. 31WECh. 10.5 - Prob. 32WECh. 10.5 - Prob. 33WECh. 10.5 - Prob. 34WECh. 10.5 - Prob. 35WECh. 10.5 - Prob. 36WECh. 10.5 - Prob. 37WECh. 10.5 - Prob. 38WECh. 10.5 - Prob. 39WECh. 10.5 - Prob. 40WECh. 10.5 - Prob. 41WECh. 10.5 - Prob. 42WECh. 10.5 - Prob. 43WECh. 10.5 - Prob. 44WECh. 10.5 - Prob. 45WECh. 10.5 - Prob. 46WECh. 10.5 - Prob. 47WECh. 10.5 - Prob. 48WECh. 10.5 - Prob. 49WECh. 10.5 - Prob. 50WECh. 10.5 - Prob. 51WECh. 10.5 - Prob. 1MRECh. 10.5 - Prob. 2MRECh. 10.5 - Prob. 3MRECh. 10.5 - Prob. 4MRECh. 10.5 - Prob. 5MRECh. 10.5 - Prob. 6MRECh. 10.5 - Prob. 7MRECh. 10.5 - Prob. 8MRECh. 10.5 - Prob. 9MRECh. 10.5 - Prob. 10MRECh. 10.5 - Prob. 11MRECh. 10.5 - Prob. 12MRECh. 10.5 - Prob. 13MRECh. 10.5 - Prob. 1STCh. 10.5 - Prob. 2STCh. 10.5 - Prob. 3STCh. 10.5 - Prob. 4STCh. 10.5 - Prob. 5STCh. 10.5 - Prob. 6STCh. 10.5 - Prob. 7STCh. 10.6 - Prob. 1OECh. 10.6 - Prob. 2OECh. 10.6 - Prob. 3OECh. 10.6 - Prob. 4OECh. 10.6 - Prob. 5OECh. 10.6 - Prob. 6OECh. 10.6 - Prob. 7OECh. 10.6 - Prob. 8OECh. 10.6 - Prob. 9OECh. 10.6 - Prob. 10OECh. 10.6 - Prob. 11OECh. 10.6 - Prob. 12OECh. 10.6 - Prob. 13OECh. 10.6 - Prob. 14OECh. 10.6 - Prob. 15OECh. 10.6 - Prob. 16OECh. 10.6 - Prob. 1WECh. 10.6 - Prob. 2WECh. 10.6 - Prob. 3WECh. 10.6 - Prob. 4WECh. 10.6 - Prob. 5WECh. 10.6 - Prob. 6WECh. 10.6 - Prob. 7WECh. 10.6 - Prob. 8WECh. 10.6 - Prob. 9WECh. 10.6 - Prob. 10WECh. 10.6 - Prob. 11WECh. 10.6 - Prob. 12WECh. 10.6 - Prob. 13WECh. 10.6 - Prob. 14WECh. 10.6 - Prob. 15WECh. 10.6 - Prob. 16WECh. 10.6 - Prob. 17WECh. 10.6 - Prob. 18WECh. 10.6 - Prob. 19WECh. 10.6 - Prob. 20WECh. 10.6 - Prob. 21WECh. 10.6 - Prob. 22WECh. 10.6 - Prob. 23WECh. 10.6 - Prob. 24WECh. 10.6 - Prob. 25WECh. 10.6 - Prob. 26WECh. 10.6 - Prob. 27WECh. 10.6 - Prob. 28WECh. 10.6 - Prob. 29WECh. 10.6 - Prob. 30WECh. 10.6 - Prob. 31WECh. 10.6 - Prob. 32WECh. 10.6 - Prob. 33WECh. 10.6 - Prob. 34WECh. 10.6 - Prob. 35WECh. 10.6 - Prob. 36WECh. 10.6 - Prob. 37WECh. 10.6 - Prob. 38WECh. 10.6 - Prob. 39WECh. 10.6 - Prob. 40WECh. 10.6 - Prob. 41WECh. 10.6 - Prob. 42WECh. 10.7 - Prob. 1OECh. 10.7 - Prob. 2OECh. 10.7 - Prob. 3OECh. 10.7 - Prob. 4OECh. 10.7 - Prob. 1PCh. 10.7 - Prob. 2PCh. 10.7 - Prob. 3PCh. 10.7 - Prob. 4PCh. 10.7 - Prob. 5PCh. 10.7 - Prob. 6PCh. 10.7 - Prob. 7PCh. 10.7 - Prob. 8PCh. 10.7 - Prob. 9PCh. 10.7 - Prob. 10PCh. 10.7 - Prob. 11PCh. 10.7 - Prob. 12PCh. 10.7 - Prob. 13PCh. 10.7 - Prob. 14PCh. 10.7 - Prob. 15PCh. 10.7 - Prob. 16PCh. 10.7 - Prob. 17PCh. 10.7 - Prob. 18PCh. 10.7 - Prob. 19PCh. 10.7 - Prob. 20PCh. 10.7 - Prob. 21PCh. 10.7 - Prob. 22PCh. 10.7 - Prob. 1MRECh. 10.7 - Prob. 2MRECh. 10.7 - Prob. 3MRECh. 10.7 - Prob. 4MRECh. 10.7 - Prob. 5MRECh. 10.7 - Prob. 6MRECh. 10.7 - Prob. 7MRECh. 10.7 - Prob. 8MRECh. 10.7 - Prob. 9MRECh. 10.7 - Prob. 10MRECh. 10.7 - Prob. 11MRECh. 10.7 - Prob. 12MRECh. 10.8 - Prob. 1OECh. 10.8 - Prob. 2OECh. 10.8 - Prob. 3OECh. 10.8 - Prob. 4OECh. 10.8 - Prob. 5OECh. 10.8 - Prob. 6OECh. 10.8 - Prob. 7OECh. 10.8 - Prob. 8OECh. 10.8 - Prob. 9OECh. 10.8 - Prob. 10OECh. 10.8 - Prob. 11OECh. 10.8 - Prob. 12OECh. 10.8 - Prob. 13OECh. 10.8 - Prob. 14OECh. 10.8 - Prob. 15OECh. 10.8 - Prob. 16OECh. 10.8 - Prob. 1WECh. 10.8 - Prob. 2WECh. 10.8 - Prob. 3WECh. 10.8 - Prob. 4WECh. 10.8 - Prob. 5WECh. 10.8 - Prob. 6WECh. 10.8 - Prob. 7WECh. 10.8 - Prob. 8WECh. 10.8 - Prob. 9WECh. 10.8 - Prob. 10WECh. 10.8 - Prob. 11WECh. 10.8 - Prob. 12WECh. 10.8 - Prob. 13WECh. 10.8 - Prob. 14WECh. 10.8 - Prob. 15WECh. 10.8 - Prob. 16WECh. 10.8 - Prob. 17WECh. 10.8 - Prob. 18WECh. 10.8 - Prob. 19WECh. 10.8 - Prob. 20WECh. 10.8 - Prob. 21WECh. 10.8 - Prob. 22WECh. 10.8 - Prob. 23WECh. 10.8 - Prob. 24WECh. 10.8 - Prob. 25WECh. 10.8 - Prob. 26WECh. 10.8 - Prob. 27WECh. 10.8 - Prob. 28WECh. 10.8 - Prob. 29WECh. 10.8 - Prob. 30WECh. 10.8 - Prob. 31WECh. 10.8 - Prob. 32WECh. 10.8 - Prob. 33WECh. 10.8 - Prob. 34WECh. 10.8 - Prob. 35WECh. 10.8 - Prob. 36WECh. 10.8 - Prob. 37WECh. 10.8 - Prob. 38WECh. 10.8 - Prob. 39WECh. 10.8 - Prob. 40WECh. 10.8 - Prob. 41WECh. 10.8 - Prob. 42WECh. 10.8 - Prob. 43WECh. 10.8 - Prob. 44WECh. 10.8 - Prob. 45WECh. 10.8 - Prob. 46WECh. 10.8 - Prob. 47WECh. 10.8 - Prob. 48WECh. 10.8 - Prob. 49WECh. 10.8 - Prob. 50WECh. 10.8 - Prob. 51WECh. 10.8 - Prob. 1STCh. 10.8 - Prob. 2STCh. 10.8 - Prob. 3STCh. 10.8 - Prob. 4STCh. 10.8 - Prob. 5STCh. 10.8 - Prob. 1ECh. 10.8 - Prob. 2ECh. 10.8 - Prob. 3ECh. 10 - Prob. 1CRCh. 10 - Prob. 2CRCh. 10 - Prob. 3CRCh. 10 - Prob. 4CRCh. 10 - Prob. 5CRCh. 10 - Prob. 6CRCh. 10 - Prob. 7CRCh. 10 - Prob. 8CRCh. 10 - Prob. 9CRCh. 10 - Prob. 10CRCh. 10 - Prob. 11CRCh. 10 - Prob. 12CRCh. 10 - Prob. 13CRCh. 10 - Prob. 14CRCh. 10 - Prob. 15CRCh. 10 - Prob. 16CRCh. 10 - Prob. 1CTCh. 10 - Prob. 2CTCh. 10 - Prob. 3CTCh. 10 - Prob. 4CTCh. 10 - Prob. 5CTCh. 10 - Prob. 6CTCh. 10 - Prob. 7CTCh. 10 - Prob. 8CTCh. 10 - Prob. 9CTCh. 10 - Prob. 10CTCh. 10 - Prob. 11CTCh. 10 - Prob. 12CTCh. 10 - Prob. 13CTCh. 10 - Prob. 1MPSCh. 10 - Prob. 2MPSCh. 10 - Prob. 3MPSCh. 10 - Prob. 4MPSCh. 10 - Prob. 5MPSCh. 10 - Prob. 6MPSCh. 10 - Prob. 7MPSCh. 10 - Prob. 8MPSCh. 10 - Prob. 9MPSCh. 10 - Prob. 10MPSCh. 10 - Prob. 11MPSCh. 10 - Prob. 12MPSCh. 10 - Prob. 13MPS

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