Question

Решить уравнение:
А)5х+3х²=0;
Б)3х-1 х-1
----------- - -------=2;
5 2

Answer 1

А)

$5x + 3 {x}^{2} = 0 \ 3 {x}^{2} + 5x = 0 \ x(3x + 5) = 0 \ x_1 = 0 \ 3x + 5 = 0 \ 3x = - 5 \ x = frac{ - 5}{3} \ x_2 = - 1 frac{2}{3}$

Б)

$frac{3x - 1}{5} - frac{x - 1}{2} = 2 : : : : | cdot 10 \ 2(3x - 1) - 5(x - 1) = 2 cdot10 \ 6x - 2 - 5x + 5 = 20 \ x + 3 = 20 \ x = 20 - 3 \ x = 17$