Question

How do you multiply `( x + 3)^2`?

Answer 1

`=color(blue)(x^2 + 6x+ 9`

Explanation:

`(x+3)^2`

This expression is of the form of the identity:

`color(blue)((a+b))^2 = a^2 +2ab +b^2`

So,
`color(blue)((x+3)^2) = x^2 + 2 . x . 3 + 3^2`

`=color(blue)(x^2 + 6x+ 9`