Algebra Examples

$21 x^{2} = - 12 x$

Step 1

Add $12 x$ to both sides of the equation.

$21 x^{2} + 12 x = 0$

Step 2

Factor $3 x$ out of $21 x^{2} + 12 x$ .

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Step 2.1

Factor $3 x$ out of $21 x^{2}$ .

$3 x (7 x) + 12 x = 0$

Step 2.2

Factor $3 x$ out of $12 x$ .

$3 x (7 x) + 3 x (4) = 0$

Step 2.3

Factor $3 x$ out of $3 x (7 x) + 3 x (4)$ .

$3 x (7 x + 4) = 0$

$3 x (7 x + 4) = 0$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$