Question

What is the value of the discriminant for the quadratic equation –3 = –x2 + 2x?

Discriminant = b2 – 4ac

–8
4
8
16

Answer 1

Answer: 16

Explanation:

Answer 2

The discriminant of a quadratic expression
`ax^2+bx+c`, where a in not 0, is the expression

`D=b^2-4ac`.

We can rewrite
`-3=-x^2+2x` as
`-x^2+2x+3=0`.

Thus, a=-1, b=2, c=3. Substituting these values in
`D=b^2-4ac`, we have:


`D=(2)^2-4(-1)3=4+12=16`.


Answer: 16