Question

Решите еще одно пж
{x+y=4
{x^2-y^2=8

Answer 1

Х + y = 4
X^2 - y^2 = 8
••••••••••
X = 4 - y
16 - 8y + y^2 - y^2 = 8
16 - 8 = 8y
8y = 8
y = 1
X = 4 - 1 = 3
Ответ ( 3 ; 1 )