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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.”
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 (22)
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Solving Quadratic Equations by Factoring
Problem 1 14,316 viewsSolve by factoring:
x² + 4x = 0 
Solving Quadratic Equations by Factoring
Problem 2 11,599 viewsSolve by factoring:
x² + 2x = 15 
Solving Quadratic Equations by Factoring
Problem 3 10,543 viewsSolve by factoring:
x² + 6x + 9 = 0 
Solving Quadratic Equations by Factoring
Problem 4 10,429 viewsSolve by factoring:
3x² − 18x = 27 
Solving Quadratic Equations by Factoring
Problem 5 1,335 views 
Solving Quadratic Equations by Factoring
Problem 6 1,320 views 
Solving Quadratic Equations by Factoring
Problem 7 1,157 views 
Solving Quadratic Equations by Factoring
Problem 8 1,151 views 
Solving Quadratic Equations by Factoring
Problem 9 1,109 views 
Solving Quadratic Equations by Factoring
Problem 10 1,163 views 
Solving Quadratic Equations by Factoring
Problem 11 1,056 views 
Solving Quadratic Equations by Factoring
Problem 12 1,053 views 
Solving Quadratic Equations by Factoring
Problem 13 1,053 views 
Solving Quadratic Equations by Factoring
Problem 14 1,169 views 
Solving Quadratic Equations by Factoring
Problem 15 990 views 
Solving Quadratic Equations by Factoring
Problem 16 382 views 
Solving Quadratic Equations by Factoring
Problem 17 419 views 
Solving Quadratic Equations by Factoring
Problem 18 359 views 
Solving Quadratic Equations by Factoring
Problem 19 397 views 
Solving Quadratic Equations by Factoring
Problem 20 388 views 
Solving Quadratic Equations by Factoring
Problem 21 375 views 
Solving Quadratic Equations by Factoring
Problem 22 298 views
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