Question

factorize 3x square -x-4

Answer 1

$3 {x}^{2} + 3x - 4x - 4 \\ 3x(x + 1) - 4(x + 1) \\ (3x - 4)(x + 1) \\ x = \frac{4}{3} and \: - 1$
hope you get the answer

Answer 2

3x^2-x-4=0

(x-4/3) (x+1)=0

x=4/3,-1