Question

I need some algebraic help so I don't fail.

Answer 1

(x-y)^2 +4xy = (x+y)^2

FOIL

x^2 -2xy+y^2 +4xy = (x+y)^2 x^2 -2xy

Combine like terms

x^2 +2xy +y^2 = (x+y)^2 x^2 +2xy

Factor

(x+y)^2 = (x+y)^2 (x+y)^2