a.
To estimate the value of
a.
Answer to Problem 66E
Explanation of Solution
Given:
Equation:
Calculation:
For
Substituting the value of y ,
Changing the equation in standard form,
So,
Splitting the middle term in such a way that the sum comes -4 and product comes 3
So,
So,
So,
b.
To use completing the square method to check the estimating part.
b.
Answer to Problem 66E
The estimation was correct.
Explanation of Solution
Given:
Equation:
Calculation:
Changing the equation in standard form,
So,
Taking constant on one side
Taking square half of coefficient of
i.e.
so,
Adding this on both side,
Therefore,
Solving right hand side,
So,
Solving root,
Therefore ,
So,
So,
Now put
So,
So,
Again, put
So,
So,
So the estimation was correct.
Chapter 9 Solutions
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