Find the Discriminant -9x^2-6x-1=0

$- 9 x^{2} - 6 x - 1 = 0$

Step 1

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

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

Step 2

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

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

Step 3

Evaluate the result to find the discriminant.

Simplify each term.

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

$36 - 4 (- 9 \cdot - 1)$

Multiply $- 4 (- 9 \cdot - 1)$ .

Multiply $- 9$ by $- 1$ .

$36 - 4 \cdot 9$

Multiply $- 4$ by $9$ .

$36 - 36$

Subtract $36$ from $36$ .

$0$