Find the Discriminant 10x^2+9x+7=0

$10 x^{2} + 9 x + 7 = 0$

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 $c$ .

$9^{2} - 4 (10 \cdot 7)$

Step 3

Evaluate the result to find the discriminant.

Simplify each term.

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

$81 - 4 (10 \cdot 7)$

Multiply $- 4 (10 \cdot 7)$ .

Multiply $10$ by $7$ .

$81 - 4 \cdot 70$

Multiply $- 4$ by $70$ .

$81 - 280$

Subtract $280$ from $81$ .

$- 199$