2. Functions

Discriminants — Quiz

Test your understanding of discriminants with 5 practice questions.

Practice Questions

Question 1

For the quadratic equation $x^2 - 5x + 6 = 0$, what does the discriminant tell us about the number of real solutions?

Question 2

Which expression is the discriminant of the quadratic $2x^2 + 3x - 4 = 0$?

Question 3

If the discriminant of a quadratic equation is $0$, what can be concluded about its real roots?

Question 4

The quadratic equation $x^2 + 4x + k = 0$ has exactly one real solution. What is the value of $k$?

Question 5

What does a negative discriminant mean for a quadratic equation with real coefficients?