Question

Place the indicated product in the proper location on the grid
(a+b)(a-2b)

Answer 1

a^2-ab-2b^2

Explanation:

It may look complicated at first sight but Its actually very simple by using a strategy called FOIL which stands for

F-front ,a*a=a^2

O-outside,a*-2b=-2ab

I-inside,a*b=ab

L-last ,-2b*b=-2b^2

so the answer would be a^2-2ab+ab-2b^2,or can be simplified as

a^2-ab-2b^2