Precalculus Examples

$x^{2} - 12 x$

To find the $c$ value $c = {(\frac{b}{2})}^{2}$ , divide the coefficient of $x$ by $2$ and square the result.

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Divide $12$ by $2$ .

${(- 1 \cdot 6)}^{2}$

Multiply $- 1$ by $6$ .

${(- 6)}^{2}$

Raise $- 6$ to the power of $2$ .

$36$

Add $36$ to get the perfect square trinomial.

$x^{2} - 12 x + 36$

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