Question

Which of the following expressions is equivalent to

Answer 1

First what I do is take separate x's and y's inside the ( ) then I like to put the x's and y's off to the side so then if you take 6+12 you get 18 but you have to multiply by 1/2 or divide by two and you get 9 that means that the answer is A because one of the y's is + the other is -

Answer 2

$\frac{1}{2}y^2 (6x + 2y+12x-2y)\\\\= \frac{1}{2}y^2 (18x)\\\\=9xy^2$

A) 9xy²