
Concept explainers
(a)
To find evaluate the expression and then simplify.
(a)

Answer to Problem 53E
Explanation of Solution
Given information:
Formula Used: Factorisation
Calculation:
(b)
To simplify the expression and then evaluate.
(b)

Answer to Problem 53E
Explanation of Solution
Given information:
Formula Used: Factorisation
Calculation:
Simplest form of
(c)
To compare the result.
(c)

Answer to Problem 53E
Results from parts (a) and (b) are same.
Method (b) requires less work because it needs less calculation.
Explanation of Solution
Given information:
Formula Used: Factorisation
Calculation:
Results from parts (a) and (b) are same.
Method (b) requires less work because it needs less calculation.
(d)
To compare the result.
(d)

Answer to Problem 53E
Results are same.
Explanation of Solution
Given information:
Formula Used: Factorisation
Calculation:
Simplest form of
So, Results are same.
Chapter 4 Solutions
Pre-Algebra
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