Question

Find the following squares by using the identities. (b-7)^2
please explain properly ​

Answer 1

(a-b)²=a²+b²-2ab

(b-7)²=b²+49-14b

Answer 2

(b−7) 2

=(b−7)(b−7)

=b(b−7)−7(b−7)

=b 2−7b−7b+49

=b 2−14b+49

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