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Solving Quadratic Equations by Factoring  Problem 14
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
When you have a polynomial equation in standard form, meaning the exponents are in decreasing order and it's equal to zero, you'll want to look for a greatest common factor. Once that is factored out, you'll set each factor equal to zero and solve for x. What if your GCF is just a number? What if it is a variable? These are commonly asked questions if the GCF if just a number, and we set that number equal to zero, it doesn't really make sense (like 4 = 0) and certainly doesn't help us solve for x. In that case, the GCF doesn't tell us a solution. BUT, if the GCF has x in it, and you set it equal to zero, chances are you'll get that x = 0 is a solution to your equation, which is very important. Here, the GCF does indeed represent a solution.
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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.”
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Sample Problems (22)
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Solving Quadratic Equations by Factoring
Problem 1 15,209 viewsSolve by factoring:
x² + 4x = 0 
Solving Quadratic Equations by Factoring
Problem 2 12,289 viewsSolve by factoring:
x² + 2x = 15 
Solving Quadratic Equations by Factoring
Problem 3 11,088 viewsSolve by factoring:
x² + 6x + 9 = 0 
Solving Quadratic Equations by Factoring
Problem 4 11,230 viewsSolve by factoring:
3x² − 18x = 27 
Solving Quadratic Equations by Factoring
Problem 5 1,694 views 
Solving Quadratic Equations by Factoring
Problem 6 1,665 views 
Solving Quadratic Equations by Factoring
Problem 7 1,447 views 
Solving Quadratic Equations by Factoring
Problem 8 1,393 views 
Solving Quadratic Equations by Factoring
Problem 9 1,377 views 
Solving Quadratic Equations by Factoring
Problem 10 1,418 views 
Solving Quadratic Equations by Factoring
Problem 11 1,280 views 
Solving Quadratic Equations by Factoring
Problem 12 1,341 views 
Solving Quadratic Equations by Factoring
Problem 13 1,282 views 
Solving Quadratic Equations by Factoring
Problem 14 1,480 views 
Solving Quadratic Equations by Factoring
Problem 15 1,277 views 
Solving Quadratic Equations by Factoring
Problem 16 639 views 
Solving Quadratic Equations by Factoring
Problem 17 656 views 
Solving Quadratic Equations by Factoring
Problem 18 558 views 
Solving Quadratic Equations by Factoring
Problem 19 618 views 
Solving Quadratic Equations by Factoring
Problem 20 607 views 
Solving Quadratic Equations by Factoring
Problem 21 607 views 
Solving Quadratic Equations by Factoring
Problem 22 592 views
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