Question

factories the following
3x^2-x-4

Answer 1

$3x^2-x-4 \\ \\ 3x^2+3x-4x-4 \\ \\ 3x(x+1)-4(x+1) \\ \\ (3x-4)(x+1)$

$x = 1\frac{1}{3} \ \ \ ; \ \ \ x = -1$