Concept explainers
a.
To find the error in the given step to simplify
a.

Answer to Problem 22MCQ
Explanation of Solution
Given:
First step in simplifying
Concept Used:
An rational expression is simplified by dividing the common factor from denominator and numerator.
Calculation:
In order to find the error in the given step to simplify
When given first step in simplifying is to divide out the common factor
First, note that
Since,
So first step can’t be to divide out the common factor
Thus, the error is:
b.
To tell the first step to in order to simplify
b.

Answer to Problem 22MCQ
Explanation of Solution
Given:
Concept Used:
An rational expression is simplified by dividing the common factor from denominator and numerator.
Calculation:
In order to tell the first step to in order to simplify
Put
So that numerator and denominator term will have a common factor to divide, as
Now, above can be further simplified by dividing the common factor
Thus, first error should be to rewrite:
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