Question

X+y=2
X ao quadrado - y ao quadrado = 2

Answer 1

x=1,5
y=0,5
espero ter ajudado

Answer 2

$x+y=2\\ x^2-y^2=2\\ x=2-y\\\\ (2-y)^2-y^2=2\\ 4-4y+y^2-y^2=2\\ 4-4y=2\\ -4y=-2\\ y=-1/2\\\\ x+y=2\\ x-1/2=2\\ x=2+1/2 \\ x=3/2$

Resposta: x = 3/2 y = -1/2.