Question

Решите уравнение (5x+1)^2-(5x+2)(5x-2)=0

Answer 1

(5x + 1)² - (5x + 2)(5x - 2)=0
25x² + 10x + 1 - (25x² - 4) = 0
25x² + 10x + 1 - 25x² + 4 = 0
10x + 5 = 0
10x = - 5
x = - 5/10
x = - 1/2