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Simplifying Rational Functions with Factoring and GCFs  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
A complex fraction, also called a double fraction, is two or more fractions stacked inside each other. To make things even uglier, here we have a sum or difference of fractions embedded in a complex fraction. You could find common denominators a few times and multiply by reciprocals, but here we look at a shortcut for "clearing" the denominators: multiply top and bottom by the least common denominator of all fractions. This is mathematically valid because you're really just multiplying by a clever form of one, but the fractions will turn into integers.
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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”
Sample Problems (15)
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Simplifying Rational Functions with Factoring and GCFs
Problem 1 5,912 viewsSimplify and find any excluded values.
4x³ 16x 
Simplifying Rational Functions with Factoring and GCFs
Problem 2 5,336 viewsSimplify and find any excluded values.
18x³ 6x + 12 
Simplifying Rational Functions with Factoring and GCFs
Problem 3 4,827 viewsSimplify and find any excluded values.
8m + 16 2m² + 5m + 2 
Simplifying Rational Functions with Factoring and GCFs
Problem 4 4,398 viewsSimplify and find any excluded values.
9 − 3x 3x² − 9 − 6x 
Simplifying Rational Functions with Factoring and GCFs
Problem 5 643 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 6 621 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 7 577 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 8 613 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 9 500 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 10 572 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 11 681 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 12 540 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 13 554 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 14 613 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 15 549 views
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