How do you find the discriminant x^2+2x+8=0?

1 Answer
Johnson Z.
Feb 28, 2016

D=-28

Explanation:

The discriminant can be found by using the discriminant formula:

b^2-4ac

Finding the Discriminant
1. Determine the a, b, and c values of the quadratic equation. In your case, a=1, b=2, and c=8. Substitute these values into the discriminant formula.

b^2-4ac

=(2)^2-4(1)(8)

2. Solve.

=4-32

=color(green)(-28)

:., the discriminant is -28.

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