Question

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

Discriminant = b2 – 4ac

–8
4
8
16

Answer 1

d) 16

Explanation:

edge 2020-2021

Answer 2

16

Explanation:

The quadratic equation –3 = –x2 + 2x must first be rewritten in standard form:

x^2 - 2x - 3 = 0

or:

1x^2 - 2x - 3 = 0

The coefficients a, b and c are thus {1, -2, -3}, and therefore the discriminant, b^2 - 4ac, is

(-2)^2 - 4(1)(-3), or 4 + 12 = 16