Question

Упростить
помогите пжжпжпжпж

Answer 1

1)x=2-y
2)(2-y)y=-8
2y-y²+8=0
-y²+2y+8=0
y²-2y-8=0
y1+y2=2
y1•y2= -8
y1=4 y2= -2
3) x1=2-4=-2
x2=2+2=4