Like what you saw?
Create FREE Account and:
- Watch all FREE content in 21 subjects(388 videos for 23 hours)
- FREE advice on how to get better grades at school from an expert
- FREE study tips and eBooks on various topics
The Discriminant - Problem 3
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
The discriminant is a value that is found by doing "b squared minus 4ac" of a quadratic function, which you'll recognize as part of the quadratic formula. The discriminant tells us how many solutions a quadratic function has (but not what those solutions actually are.) If the discriminant value is positive, then you'll have two real solutions, if the discriminant is zero then you'll have one real solution, and if the discriminant is negative, then there will be no real solutions. This can help you with graphing, as well, since the real solutions will show up as the x-intercepts.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
Sample Problems (5)
Need help with a problem?
Watch expert teachers solve similar problems.
Problem 1 4,799 views
Find the number of solutions of3x² − 2x = 7
Problem 2 3,855 views
A furniture business uses the formula f(x) = 5400 + 300x − 40x² to calculate its monthly income, where f(x) stands for income and x represents the number of items sold. Will their monthly income ever reach $6000?
Problem 3 902 views
Problem 4 627 views
Problem 5 617 views