Question

Решите уравнения.
1)(3х+5)(3х-5)-(3х-1)²=-4​

Answer 1

Ответ:

$9 {x}^{2} - 25 - 9 {x}^{2} - 6x + 1 = - 4 \ 6x = 25 - 1 - 4 \ 6x = 20 \ x = 20 div 6 \ x = 3.3$