Question

(x-10)^2=(x+4)^2
Найдите корень уравнения

Answer 1

(x - 10)^2 - (x + 4)^2 =  0 
(x - 10 - (x + 4)) * (x - 10 + x + 4) = 0 
(x - 10 - x - 4) * ( 2x - 6 ) = 0 
- 14 *2 (x-  3)=  0
x - 3 = 0 
x = 3