Question

Решите систему уравнений 5x-y-2=0 x2-2xy+y2=4

Answer 1

$\left \{ {{y=5x-2} \atop {(x-y)^2=4}} \right.$
$(x-5x-2)^2=4$
$(-4x-2)^2=4 => -4x-2=2 => x=-1$
$y=5*(-1)-2=-7$
Ответ:-1 и -7