Question

04) Simplifique as expressões:
a) (x+y)2 - x2 - y2
Solução:
(x+y)-x-y2 = x2+2xy+y2-x2-y2 = 2xy
b) (2x-y)2 - 4x(x-y)​

Answer 1

a)

(x+y)²-x2-y2 = x2+2xy+y2-x2-y2 = 2xy