Question

a)(x+4y)(x-4y) efetue:

Answer 1

Olá,

(x+4y)(x-4y) = x(x)+x(-4y)+4y(x)+4y(-4y) = x²-4xy+4xy-16y²
(x+4y)(x-4y) = x²+0-16y² = x²-16y²

Resposta:

x²-16y²