Question

Using suitable identity evaluate
9² - 7 ² with full solution.
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Answer 1

(a+b) (a-b) = a2 - b2

(9)2 - (7)2

81-49

32

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Answer 2

Answer:

2^2

Step-by-step explanation:

(9-7)^2. {a^m-b^m}

2^2. {(a-b)^m}

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