Question

Calculate the discriminant.

x2 – x + 2 = 0

A.
9

B.
–7

C.
–9

D.
7

Answer 1

You have a quadratic equation.
Use the quadratic formula: $$x=\frac{-b\pm\sqrt{ b^2 - 4ac}}{2a}$$

The discriminant is: $$\sqrt{ b^2 - 4ac}$$