SOLUTION: use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to find the roots; jus

Question 36031: use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to find the roots; just determine the number and types of solutions.
x^2 + 6x - 7 = 0
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
First, you need to know what the discriminant is.
It is the portion underneath the root in the quadratic formula.

so now using the equation you have ...

Plug in the values

because this number is positive, there are 2 roots.
if the number were 0, there would be one root.
if the number was negative, there are no roots.
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