Question

{y-x2=1 {x-y=-1
3способами даю 50балов

Answer 1

{y-x2=1
{x-y=-1 
складываем
y-x^2+x-y=1-1
x-x^2=0
x(1-x)=0
x1=0
y1=1
x2=1
y2=2
=======================
y=x+1
x+1-x^2=1
x(1-x)=0
x1=0  y1=1
x2=1  y2=2
=====================
y=1+x^2
x-(1+x^2)=-1
x-x^2=0
x(1-x)=0
x1=0  y1=1
x2=1  y2=2

ответ ( 0 1) (1 2)