Question

How do you multiply `(7-a)^2`?

Answer 1

`a^2-14a+49`

Explanation:

`(7-a)^2`

`=(7)^2 + 2(7)(-a) + (-a)^2`

`=49 -14a+a^2`

If you want the powers written in order:

`=a^2-14a+49`