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

Question

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

Answer 1

4x^2 - 9 - (4x^2 - 12x + 5x - 15) = - 1
4x^2 - 9 - 4x^2 + 7x + 15 = - 1
7x + 6 = - 1
7x = - 7
x = - 1