<span>1/3 x = - 2/9 умножим обе части на 3
3* 1/3 *x = -2/9 *3 = -2*3/9 = - 2/3
3/3 *x = - 2/3
1* x = -2/3
x = - 2/3</span>
(2x - 5)² - 0,5x = (2x - 1)(2x + 1) - 15
4x² - 20x + 25 - 0,5x = 4x² - 1 - 15
4x² - 20x - 0,5x - 4x² = -1 - 15 - 25
-20,5x = -41
x = 41 / 20,5
x = 2
Ответ: x = 2