Question

Factorise:

$15 {x}^{2} - x - 28$
​

Answer 1

$\huge\red{\underline{\underline{Hello}}}$

$> 15 {x}^{2} - x - 28 = 0 \\ \\ > 15 {x}^{2} + 20x - 21x - 28 = 0 \\ \\ > 5x(3x \: + 4) -7 (3x + 4) = 0 \\ \\ > (5x - 7)(3x + 4) = 0 \\ \\ > x = \frac{7}{5} or \: \\ \\ > x = \frac{ - 4}{3}$

____THANK U____