Concept explainers
a.
Find the real zeros of the function
a.
Answer to Problem 65E
Explanation of Solution
Given:
Function:
Calculation for graph:
Consider
Values of x | Values of f (x) |
0 | 22 |
1 | 0 |
-1 | 36 |
2 | 0 |
-2 | 36 |
By taking different values of x, the graph can be plotted.
Graph:
Interpretation:
By observing graph, it is clear that the curve of the function meets x-axis at
Hence, the real zeros of the function are
Conclusion:
Therefore, the real zeros of given polynomial function are
b.
By using real zeros of the function
b.
Answer to Problem 65E
Explanation of Solution
Given:
Function:
Calculation:
From above answer, the real zeros of function are
So,
To find other zeros, put
The above polynomial equation is a quadratic equation.
The zeros of a quadratic equation
Applying above formula,
Conclusion:
Therefore, the zeros of given polynomial function are
Chapter 2 Solutions
Precalculus with Limits: A Graphing Approach
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