Respuesta :

Answer:

It is 8.

Step-by-step explanation:

The discriminant of the equation ax^2 + bx + c = 0 is b^2 - 4ac.

So for  -x^2 + 4x - 2 it is  4^2 - 4 * -1 * -2

= 16 - 8

= 8 (answer).