Find the Perfect Square Trinomial r^2+2r

$r^{2} + 2 r$

Step 1

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

Divide $2$ by $2$ .

$1^{2}$

One to any power is one.

$1$

Step 2

Add $1$ to get the perfect square trinomial.

$r^{2} + 2 r + 1$