Factor 4x^2+12x=0

$4 x^{2} + 12 x = 0$

Factor $4 x$ out of $4 x^{2}$ .

$4 x (x) + 12 x = 0$

Factor $4 x$ out of $12 x$ .

$4 x (x) + 4 x (3) = 0$

Factor $4 x$ out of $4 x (x) + 4 x (3)$ .

$4 x (x + 3) = 0$

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