{y=x-1 {x^2-2y=26

Question

{y=x-1 {x^2-2y=26

Answer 1

Y=x-1
x²-2y=26
x²-2(x-1)=26
x²-2x+2-26=0
x²-2x-24=0
x1+x2=2 U x1*x2=-24
x1=-4⇒y1=-4-1=-5
x2=6⇒y2=6-1=5
(-4;-5);(6;5)