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The Discriminant  Problem 5
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, or b^24ac, 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 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.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
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Sample Problems (5)
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The Discriminant
Problem 1 4,497 viewsFind the number of solutions of
3x² − 2x = 7 
The Discriminant
Problem 2 3,500 viewsA 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?

The Discriminant
Problem 3 752 views 
The Discriminant
Problem 4 521 views 
The Discriminant
Problem 5 501 views
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