Question

xy =12 qual o valor de (x-y)2 - (x+y)2

Answer 1

Resposta:

(x-y)2-(x+y)2

x² - 2xy + y² -(x² + 2xy + y²)

x² - 2xy + y² - x² - 2xy - y²

- 2xy - 2xy ==> - 4xy

- 4.12 ==> - 48