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The Discriminant  Problem 3
Alissa Fong
Alissa Fong
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 xintercepts.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
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Sample Problems (5)
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The Discriminant
Problem 1 4,721 viewsFind the number of solutions of
3x² − 2x = 7 
The Discriminant
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The Discriminant
Problem 3 847 views 
The Discriminant
Problem 4 587 views 
The Discriminant
Problem 5 577 views
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