# How do you solve 0=-3x(2x+5)?

$x = 0$ or $x = - \frac{5}{2}$
If two factors multiply t give zero, one or other of them must be equl to zero. Therefore either $- 3 x = 0$ or $2 x + 5 = 0$
Therefore $x = 0$ or $2 x = - 5$
$x = 0$or $x = - \frac{5}{2}$