Question

plz factorise this friends

Answer 1

$9 {x}^{2} - 155x - 500 = 0 \\ = > 9 {x}^{2} + 25x - 180x - 500 = 0 \\ = > x(9x + 25) - 20(9x + 25) = 0 \\ = > (9x + 25)(x - 20) = 0 \\ = > 9x + 25 = 0 \: or \: x - 20 = 0 \\ = > x = - \frac{25}{9} \: \: \: or \: x = 20$