Question

Решите уравнение:
(2x + 3)² - (2x - 1)(2x + 1) = 46​

Answer 1

$(2x+3)^{2} -(2x-1)(2x+1)=46$

$4x^{2} +12x+9-(4x^{2} -1)=46$

$4x^{2} +12x+9- 4x^{2} +1 = 46$

$12x+10=46$

$12x=46-10$

$12x=36$

$x=36:12$

$x=3$

Ответ: 3.