Решите уравнение (x-1)^2+(x-2)^2=2x^2+7

Question

Решите уравнение
(x-1)^2+(x-2)^2=2x^2+7

Answer 1

X^2 - 2x + 1 + x^2 - 4x + 4 = 2x^2 + 7
2x^2 - 6x + 5 = 2x^2 + 7
- 6x + 5 = 7 
- 6x = - 12
6x = 12
x = 2