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Evaluate using suitable identity:
$(b-7)^2$
Given:
$(b-7)^2$
To do:
We have to evaluate $(b-7)^2$ using a suitable identity.
Solution:
We know that,
$(a-b)^2=a^2-2ab+b^2$
Therefore,
$(b-7)^2=(b)^2-2\times b\times7 +(7)^2$
$b^2-14b+49$.
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