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,

$(b-7)^2=(b)^2-2\times b\times7 +(7)^2$

$b^2-14b+49$.

Tutorialspoint

Updated on: 10-Oct-2022

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