Question

Помогите решить систему уравнений!
Сам решал, какой-то бред получился.

Answer 1

$\displaystyle\bf \left \{ {{x^{2} -y^{2} =12} \atop {x+y=6}} \right.\\\\\\ \left \{ {{(x+y)(x-y)=12} \atop {x+y=6}} \right. \\\\\\ \left \{ {{6\cdot(x-y)=12} \atop {x+y=6}} \right.\\\\\\ +\left \{ {{x-y=2} \atop {x+y=6}} \right. \\ --------\\ 2x=8\\\\ x=4\\\\ y=6-x=6-4=2\\\\ Otvet:\left \{ {{x=4} \atop {y=2}} \right.$