Question

Дополнительное задание: (2х−3)(х +7) = (х – 4)(2х +3) + 3

Answer 1

Ответ:

$(2x - 3) \times (x + 7) = (2x + 3) + 3 \\ {2x}^{2} + 14 - 3x - {21} = {2x}^{2} + 3x - 8x - 12 + 3 \\ 14x - 3x - 21 = 3x - 8x - 12 + 3 \\ 11x - 21 = - 5x - 9 \\ 11x + 5x = - 9 + 21 \\ 16x = 12 \\ x = \frac{3}{4}$