Question

решите систему уравнений
x^2-y^2=3
x-y=3

Answer 1

$\left \{ {{x^2-y^2=3} \atop {x-y=3}} \right. \left \{ {{(x-y)(x+y)=3} \atop {x-y=3}} \right. \left \{ {{x+y=1} \atop {x-y=3}} \right.\\\\2x=4 ; x=2\\x+y=1 ; y=1-x; y=-1$

Ответ (2 ; -1)