Question

Simplifique a expressão (x – y)2 – (x + y)2

Answer 1

(x – y)² – (x + y)² =
(x² – 2xy + y²) – (x² + 2xy + y²) =
x² – 2xy + y² – x² – 2xy – y² =
x² – x² – 2xy – 2xy + y² – y² =
– 4xy


Espero ter ajudado.
Bons estudos.

Answer 2

(x-y)² -( x+y)²= x² -2xy +y² - (x² + 2xy +y²)= x² -x² -2xy -2xy +y²- y²= - 4xy