Question

решите систему уравнений х²-2у-3х+8=0 2х-у=1

Answer 1

{x^2 -2y -3x +8 =0
{2x-y=1

{y=-1+2x
{x^2-7x+10=0
D= 9
x1=2 x2=5
y(2)=-1+2*2=3
y(5) = -1+2*5=9