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Simplifying Rational Functions with Factoring and GCFs  Problem 1
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
This is a rational expression fraction that needs to be simplified so what I’m going to do is cross out any factors I have in the numerator and the denominator that are exactly the same.
One thing you might notice is that 4/16 can be reduced to ¼. So the start of my reduced version is going to be ¼. I’m also going to reduce x to the third on top if x by thinking of it like this, x to the third on top of x those guys get cancelled out and on top I just have x². So my final answer here is going to be x² over 4 that’s the reduced version of that original fraction. First I reduced the constants to ¼ then I reduced the x terms. 3x is on top 1 on the bottom.
Okay the last thing it asked me to do is to find the excluded values. Remember excluded values are values of x that would make this undefined or values of x that would make this have a denominator equal to 0.
So looking just at my denominator there’s only one number that x could be that would make that equal to 0 and that number is 0. If x were 0 here this would be undefined so this is my excluded value, x cannot be equal to 0 x could be any other number I want to on the whole planet. It just can’t be 0.
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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 (15)
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Simplifying Rational Functions with Factoring and GCFs
Problem 1 5,695 viewsSimplify and find any excluded values.
4x³ 16x 
Simplifying Rational Functions with Factoring and GCFs
Problem 2 5,077 viewsSimplify and find any excluded values.
18x³ 6x + 12 
Simplifying Rational Functions with Factoring and GCFs
Problem 3 4,659 viewsSimplify and find any excluded values.
8m + 16 2m² + 5m + 2 
Simplifying Rational Functions with Factoring and GCFs
Problem 4 4,166 viewsSimplify and find any excluded values.
9 − 3x 3x² − 9 − 6x 
Simplifying Rational Functions with Factoring and GCFs
Problem 5 542 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 6 514 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 7 482 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 8 511 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 9 405 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 10 461 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 11 559 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 12 463 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 13 483 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 14 532 views 
Simplifying Rational Functions with Factoring and GCFs
Problem 15 476 views
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