Question

{X^2-3y=1
{X+y=3
Помагите пожалуйста

Answer 1

x=3-y
(3-y)^2-3y=1

9-6y+y^2-3y=1
y^2-9y+8=0
D=81-32=49
y1=(9-7)/2=1
y2=(9+7)/2=8

x1=3-1=2
x2=3-8=-5