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
Multiplying and Dividing Rational Expressions  Problem 6
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
We want to factor any polynomials when we're multiplying to see if any common factors can be canceled out (the same on top and bottom) to simplify the multiplication process. You could still potentially get the correct answer in the end if you don't cancel out common factors, but your simplification at the end would be much more labor intensive with higher degree polynomials. Once all of the common factors have been canceled out, we multiply across the top, multiply across the bottom, and simplify. Domain restrictions are any values of variables that would make any denominators equal to zero, since dividing by zero is undefined.
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 (9)
Need help with a problem?
Watch expert teachers solve similar problems.

Multiplying and Dividing Rational Expressions
Problem 1 6,942 viewsSimplify:
x² + 3x + 2 ⋅ x² + 7x + 12 x² + 4x + 3 x² − 4 
Multiplying and Dividing Rational Expressions
Problem 2 5,650 viewsSimplify:
y² − 4 ÷ 2 − y 16 8y 
Multiplying and Dividing Rational Expressions
Problem 3 4,929 viewsSimplify:
( 2x³ + 3x² − 2x ⋅ x² − 3x − 10 ) ÷ 3x² + 12x + 12 2x³ − x² 3x − 15 5x² − 10x 
Multiplying and Dividing Rational Expressions
Problem 4 1,116 views 
Multiplying and Dividing Rational Expressions
Problem 5 1,163 views 
Multiplying and Dividing Rational Expressions
Problem 6 997 views 
Multiplying and Dividing Rational Expressions
Problem 7 867 views 
Multiplying and Dividing Rational Expressions
Problem 8 1,060 views 
Multiplying and Dividing Rational Expressions
Problem 9 1,019 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete