Решите уравнение!!!! (х+50-2х)^2=20^2+х^2

Question

Решите уравнение!!!! (х+50-2х)^2=20^2+х^2

Answer 1

( 50 - x)² = 20² + x²
2500 - 100x + x² = 400 + x²
x² - x² - 100x = 400 - 2500
- 100x = - 2100
100x = 2100
x = 21

Answer 2

(х+50-2х)^2=20^2+х^2(50-х)² = 20²+х²
2500 - 100х+х² = 400+х²
х²-100х-х² = 400-2500
-100х = -2100
х = 21