Question

Resolva o sistema de equação

Answer 1

$\left \{ {{x^2-y^2=12} \atop {{x+y=2}} \right.$

x=2-y

Substituindo:

(2-y)²-y²=12

4-4y+y²-y²=12

4-4y=12

-4y=12-4

-4y=8

y=-2

x=2-y

x=2-(-2)

x=2+2

x=4

y=-2 e x=4