Find the Discriminant x^2+6x=-9

$x^{2} + 6 x = - 9$

Add $9$ to both sides of the equation.

$x^{2} + 6 x + 9 = 0$

The discriminant of a quadratic is the expression inside the radical of the quadratic formula.

$b^{2} - 4 (a c)$

Substitute in the values of $a$ , $b$ , and $c$ .

$6^{2} - 4 (1 \cdot 9)$

Evaluate the result to find the discriminant.

Simplify each term.

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

$36 - 4 (1 \cdot 9)$

Multiply $9$ by $1$ .

$36 - 4 \cdot 9$

Multiply $- 4$ by $9$ .

$36 - 36$

Subtract $36$ from $36$ .

$0$