Question

Решите уравнение: (5х-1)×(5х+1)-(5х-3)² =50

Answer 1

[TEX]
(5x-1)*(5x+1)-(5x-3)^2 =50\\
25x^2-1-(25x^2-30x+9)=50\\
25x^2-1-25x^2+30x-9=50\\
30x-10=50\\
30x=60\\
x=2
[/TEX]