Question

(2-х)^2+(9-х)^2=2х^2-3

Answer 1

(2-x)^2+(9-x)^2=2x^2-3
4-4x+(x^2)+81-18x+(x^2)=(2x^2)-3
85-22x+(2x^2)-(2x^2)+3=0
88-22x=0
22x=88
x=4