Question

Решите систему уравнений x+y=6   x^2+2y=60

Answer 1

$left { {{x+y=6} atop {x^2+2y=60}} right.$
$left { {{-2x+-2y=-12} atop {x^2+2y=60}} right.$
$-2x+x^2=48$
$x^2-2x-48=0$
$x_1=8,x_2=-6$

$y_1 = 6-x = 6 - 8 = -2$
$y_2 = 6-(-6) = 12$