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 5
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, or b^2-4ac, is part of the quadratic formula that tells us how many solutions a quadratic equation will have (but it doesn't actually tell us what those solutions are.) If the discriminant is greater than zero, you'll have two real solutions; if it is equal to zero, then you'll have one real solution; and if it is less than zero, then you'll have no real solutions. Here we connect the discriminant to basic sketches of functions as well to show how the number of solutions connects to the number of 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 4,793 views
Find the number of solutions of3x² − 2x = 7
Problem 2 3,850 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 3 900 views
Problem 4 624 views
Problem 5 611 views