Question

What is the discriminant of the quadratic equation 0 = –x2 4x – 2?

Answer 1

B. 8

Explanation:

Answer 2

Explanation:

Given is a quadratic equation of the form

`-x^2+4x-2`

WE know that for any quadratic equation of the form

`ax^2+bx+c=0`

the discriminant would be

`b^2-4ac`

The discriminant determines the nature of roots of the quadratic equation, namely, real, rational or equal roots.

Here we have for the given equation

discriminant =
`4^2-4(-1)(-2)\\=16-8\\=8`

Thus we have discriminant as positive but not perfect square

Hence roots would be distinct, irrational and real.