Question

Solve: $3x^2+11x-4=0$

Answer 1

$3x^2+11x-4=0$

$\Rightarrow 3x^2+12x-x-4=0$

$\Rightarrow 3x(x+4)-1(x+4)=0$

$\Rightarrow (x+4)(3x-1)=0$

$\therefore x=-4,\frac{1}{3}$