Find the Discriminant 2x^2-4x=-2

$2 x^{2} - 4 x = - 2$

Step 1

Add $2$ to both sides of the equation.

$2 x^{2} - 4 x + 2 = 0$

Step 2

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

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

Step 3

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

${(- 4)}^{2} - 4 (2 \cdot 2)$

Step 4

Evaluate the result to find the discriminant.

Simplify each term.

Raise $- 4$ to the power of $2$ .

$16 - 4 (2 \cdot 2)$

Multiply $- 4 (2 \cdot 2)$ .

Multiply $2$ by $2$ .

$16 - 4 \cdot 4$

Multiply $- 4$ by $4$ .

$16 - 16$

Subtract $16$ from $16$ .

$0$