Find the Discriminant -5x^2+7x-1=0

$- 5 x^{2} + 7 x - 1 = 0$

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 $c$ .

$7^{2} - 4 (- 5 \cdot - 1)$

Step 3

Evaluate the result to find the discriminant.

Simplify each term.

Raise $7$ to the power of $2$ .

$49 - 4 (- 5 \cdot - 1)$

Multiply $- 4 (- 5 \cdot - 1)$ .

Multiply $- 5$ by $- 1$ .

$49 - 4 \cdot 5$

Multiply $- 4$ by $5$ .

$49 - 20$

Subtract $20$ from $49$ .

$29$