Question

(wx-y)(wx-y) Solve.

Answer 1

w^2x^2+y^2

Answer 2

don't forget the -2*wxy

Answer 3

Thank youuu. (:

Answer 4

where did the -2 come from?

Answer 5

To solve this we can use FOIL to solve this:
First, Outside Inside Last

This refers to the pairs that we are calculating together.

Answer 6

First = w^2s^2
Outside = -wxy
Inside = -wxy
Last = y^2

Then we add all of these together

Answer 7

Final answer = w^2s^2 - 2wxy + y^2