Question

Please solve above
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Answer 1

Answer:

(b−7)²

=(b+−7)(b+−7)

=(b)(b)+(b)(−7)+(−7)(b)+(−7)(−7)

=b2−7b−7b+49

=b2−14b+49

Answer 2

Correct Question:

Evaluate using suitable identities:-

1. (b-7)²

Answer:

= b²+7²- 2×b×7 [Using (a-b)²= a²+b²+2ab]

= b²+49-14b

HENCE, THE CORRECT ANSWER IS b²+49-14b.

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