Question

решите уравнение: (3x-1)*(5x+4)-15x в квадрате=17

Answer 1

15x² - 5x + 12x - 4 - 15x² = 17
7x = 17 + 4
7x = 21
x = 3

Answer 2

15x² - 5x + 12x - 4 - 15x² = 17
7x = 17 + 4