alleryFor the quadratic equation $ax^2+bx+c=0$, what is the discriminant?
A$b^2+4ac$
B$4ac-b^2$
C$b^2-4ac$
D$\frac{-b\pm\sqrt{b^2-4ac}}{2a}$
Answer & Solution
Correct answer: C. $b^2-4ac$
The discriminant of the quadratic equation $ax^2+bx+c=0$ is the expression under the square root in the quadratic formula, namely $b^2-4ac$.
It determines the nature of the roots.
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