Question

como desenvolver?(-×-y)2​

Answer 1

Oie, Td Bom?!

$= ( - x - y) {}^{2}$

$= ( - x) {}^{2} - 2 \: . \: ( - x)y + y {}^{2}$

$= x {}^{2} + 2xy + y {}^{2}$

Att. Makaveli1996