Like what you saw?
Create FREE Account and:
 Watch all FREE content in 21 subjects(388 videos for 23 hours)
 FREE advice on how to get better grades at school from an expert
 Attend and watch FREE live webinar on useful topics
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.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
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”
Sample Problems (22)
Need help with a problem?
Watch expert teachers solve similar problems.

Solving Quadratic Equations by Factoring
Problem 1 14,575 viewsSolve by factoring:
x² + 4x = 0 
Solving Quadratic Equations by Factoring
Problem 2 11,807 viewsSolve by factoring:
x² + 2x = 15 
Solving Quadratic Equations by Factoring
Problem 3 10,669 viewsSolve by factoring:
x² + 6x + 9 = 0 
Solving Quadratic Equations by Factoring
Problem 4 10,625 viewsSolve by factoring:
3x² − 18x = 27 
Solving Quadratic Equations by Factoring
Problem 5 1,405 views 
Solving Quadratic Equations by Factoring
Problem 6 1,414 views 
Solving Quadratic Equations by Factoring
Problem 7 1,225 views 
Solving Quadratic Equations by Factoring
Problem 8 1,195 views 
Solving Quadratic Equations by Factoring
Problem 9 1,183 views 
Solving Quadratic Equations by Factoring
Problem 10 1,223 views 
Solving Quadratic Equations by Factoring
Problem 11 1,103 views 
Solving Quadratic Equations by Factoring
Problem 12 1,104 views 
Solving Quadratic Equations by Factoring
Problem 13 1,100 views 
Solving Quadratic Equations by Factoring
Problem 14 1,240 views 
Solving Quadratic Equations by Factoring
Problem 15 1,047 views 
Solving Quadratic Equations by Factoring
Problem 16 428 views 
Solving Quadratic Equations by Factoring
Problem 17 457 views 
Solving Quadratic Equations by Factoring
Problem 18 400 views 
Solving Quadratic Equations by Factoring
Problem 19 447 views 
Solving Quadratic Equations by Factoring
Problem 20 427 views 
Solving Quadratic Equations by Factoring
Problem 21 418 views 
Solving Quadratic Equations by Factoring
Problem 22 353 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete