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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.
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Sample Problems (22)
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Solving Quadratic Equations by Factoring
Problem 1 14,927 viewsSolve by factoring:
x² + 4x = 0 
Solving Quadratic Equations by Factoring
Problem 2 12,079 viewsSolve by factoring:
x² + 2x = 15 
Solving Quadratic Equations by Factoring
Problem 3 10,897 viewsSolve by factoring:
x² + 6x + 9 = 0 
Solving Quadratic Equations by Factoring
Problem 4 11,003 viewsSolve by factoring:
3x² − 18x = 27 
Solving Quadratic Equations by Factoring
Problem 5 1,577 views 
Solving Quadratic Equations by Factoring
Problem 6 1,548 views 
Solving Quadratic Equations by Factoring
Problem 7 1,355 views 
Solving Quadratic Equations by Factoring
Problem 8 1,298 views 
Solving Quadratic Equations by Factoring
Problem 9 1,281 views 
Solving Quadratic Equations by Factoring
Problem 10 1,325 views 
Solving Quadratic Equations by Factoring
Problem 11 1,189 views 
Solving Quadratic Equations by Factoring
Problem 12 1,224 views 
Solving Quadratic Equations by Factoring
Problem 13 1,197 views 
Solving Quadratic Equations by Factoring
Problem 14 1,357 views 
Solving Quadratic Equations by Factoring
Problem 15 1,179 views 
Solving Quadratic Equations by Factoring
Problem 16 539 views 
Solving Quadratic Equations by Factoring
Problem 17 564 views 
Solving Quadratic Equations by Factoring
Problem 18 479 views 
Solving Quadratic Equations by Factoring
Problem 19 545 views 
Solving Quadratic Equations by Factoring
Problem 20 528 views 
Solving Quadratic Equations by Factoring
Problem 21 526 views 
Solving Quadratic Equations by Factoring
Problem 22 478 views
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