Question

Aplicar productos notables (2x-y)^2-(x+5)^2

Answer 1

(2x - y)^2 = (2x)^2 - 2(2x)(y) + y^2 - (x)^2 + 2(x)(5) + 25

4x^2 - 4xy + y^2 - x^2 + 10x + 25 = 3x^2 + y^2 - 4xy  + 10x + 25.