Question

Решите уранение (5х+1)(5х-1)-(5х+1)^2=0

Answer 1

( 5x + 1 )( 5x - 1 ) - ( 5x + 1 )^2 = 0
25x^2 - 1 - ( 25x^2 + 10x + 1 ) = 0
25x^2 - 1 - 25x^2 - 10x - 1 = 0
- 2 - 10x = 0
10x = - 2
X = - 0,2