Find the Discriminant 8x^2+13x+5=0

$8 x^{2} + 13 x + 5 = 0$

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 $c$ .

$13^{2} - 4 (8 \cdot 5)$

Step 3

Evaluate the result to find the discriminant.

Simplify each term.

Raise $13$ to the power of $2$ .

$169 - 4 (8 \cdot 5)$

Multiply $- 4 (8 \cdot 5)$ .

Multiply $8$ by $5$ .

$169 - 4 \cdot 40$

Multiply $- 4$ by $40$ .

$169 - 160$

Subtract $160$ from $169$ .

$9$