Algebra Examples

$x^{2} + 18 x$

Step 1

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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Step 1.1

Divide $18$ by $2$ .

$9^{2}$

Step 1.2

Raise $9$ to the power of $2$ .

$81$

Step 2

Add $81$ to get the perfect square trinomial.

$x^{2} + 18 x + 81$