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Question

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


Solution

$$3{x}^{2}+11x-4=0$$
$$\Rightarrow 3{x}^{2}+12x-x-4=0$$
$$\Rightarrow 3x\left(x+4\right)-1\left(x+4\right)=0$$
$$\Rightarrow \left(x+4\right)\left(3x-1\right)=0$$
$$\therefore x=-4,\dfrac{1}{3}$$

Mathematics

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