Algebra Examples

$x^{2} + 9 x +$

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

Apply the product rule to $\frac{9}{2}$ .

$\frac{9^{2}}{2^{2}}$

Step 1.2

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

$\frac{81}{2^{2}}$

Step 1.3

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

$\frac{81}{4}$

Step 2

Add $\frac{81}{4}$ to get the perfect square trinomial.

$x^{2} + 9 x + \frac{81}{4}$