{y=1+x, {X+y²=-1; Ответ

Question

{y=1+x,
{X+y²=-1;
Ответ

Answer 1

X+(1+x)^2= -1; x+1+2x+x^2= -1; x^2+3x+2=0; D=3^2-4*1*2=9-8=1; x1=(-3-1)/2, x2=(-3+1)/2. x1= -2, x2= -1. y1=1-2= -1, y2=1-1=0. Ответ: (-2:-1),(-1:0).