Question

-3х в квадрате+13х+10=0

Answer 1

$3 {x}^{2} - 13x - 10 = 0$
$3 {x}^{2} + 2x - 15x - 10 = 0$
$x \times (3x + 2) - 5(3x + 2) = 0$

$(3x + 2) \times (x + 2) = 0$
$3x + 2 = 0$
$x - 5 = 0$
$x = - \frac{2}{3}$
$x = 5$