Question

What is the value of the discriminant for the quadratic equation 0 = x + 2 + x2?

Discriminant = b2 – 4ac

–9
–7
7
9

Answer 1

Rewrite as x^2 + x + 2 = 0, so a = 1, b = 1, c = 2.
Discriminant D = b^2 − 4ac = 1^2 − 4(1)(2) = 1 − 8 = −7.