Question

factorisation method
$5 {x}^{2} - 22x - 15 = 0$

Answer 1

hope this helps you.....

Answer 2

$\: \: \: \: \: \: 5 {x}^{2} - 22x - 15 = 0 \\ or \: \: 5 {x}^{2} - 25x + 3x - 15 = 0 \\ or \: \: 5 {x}(x - 5) + 3(x - 5) = 0 \\ or \: \: (x - 5)(5x + 3) = 0 \\ now \: \\ ({a} )\: \\ x - 5 = 0 \\ or \: x = 5 \\ (b) \\ 5x + 3 = 0 \\ or \: x = - \frac{3}{5}$
This is your answer.....