SOLUTION: What is the discriminant and how do you find it if you are given a quadratic equation? For instance, if you have -x� + 12 + 20 = 0, what would the discriminant be? How many solut

Question 475756: What is the discriminant and how do you find it if you are given a quadratic equation? For instance, if you have -x� + 12 + 20 = 0, what would the discriminant be? How many solutions would this equation have?

Found 2 solutions by rfer, Gogonati:
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
a=-1, b=12, c=20
the discriminant is the part under the radical sign.
(12^2)-4*-1*20=80+144=224
sqrt224=14.97
x=-1.5
x=13.5
two solutions
Answer by Gogonati(855) (Show Source): You can put this solution on YOUR website!
The standard form of the quadratic equation is , where a, b, c
are real numbers and a is different from zero. The discriminant of the quadratic
equation is the expression If the quadratic
equation has two real roots. If the quadratic equation has one
real root, and if the quadratic equation has not real solution.
Example:For the equation the discriminant is:
12^2-4(-1)*20=144+80=224>0, this equation has two real roots.
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