Question

Решите систему уравнений

Answer 1

$left { {{y=-x^2+6} atop {y=-x}} right. \ \ -x=-x^2+6 \ x^2-x-6=0 \ D=b^2-4ac \ D=1+24=25 \ sqrt{D} =5 \ x1= frac{(1-5)}{2} =-2 \ y1=2 \ \ x2= frac{(1+5)}{2} =3 \ y2=-3$

Ответ:$left { {{x=-2} atop {y=2}} right. \ \ left { {{x=3} atop {y=-3}} right.$