(х+5)^2+(х-10)^2=2х^2

Question

(х+5)^2+(х-10)^2=2х^2

Answer 1

Х^2 + 10х +25 + х^2 - 20х + 100 = 2х^2
2х^2 - 10х + 125 - 2х^2 =0
125 - 10х = 0
-10х = -125
Х= 12,5