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

(10x² - 6x + 5x - 3) - (10x² - 15x + 8x - 12) = -3

10x² - x -3 - 10x² + 7x +12 = -3

6x + 9 =-3

3(2x + 3) = -3

2x + 3 = -1

2x = -4

x = -2

ответ: -2.

(10x² - 6x + 5x - 3) - (10x² - 15x + 8x - 12) = -3

10x² - x -3 - 10x² + 7x +12 = -3

6x + 9 =-3

3(2x + 3) = -3

2x + 3 = -1

2x = -4

x = -2