Решите уравнение:(2х-3)(2х+3)-(4х+5)(х-3)=-1

Question

Решите уравнение:(2х-3)(2х+3)-(4х+5)(х-3)=-1

Answer 1

(2х-3)*(2х+3) - (4х+5)*(х-3) = - 1
4x^2 - 9 - (4x^2 - 12x + 5x - 15) + 1 = 0
4x^2 - 9 - 4x^2 + 7x + 16 =  0
7x + 7 = 0
x + 1 = 0
x = - 1