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Multiplying and Dividing Rationals  Problem 10
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 multiplying fractions, we multiply across the top, multiply across the bottom, and reduce. The same is true if you're multiplying a fraction times a polynomial put the polynomial over one so you can be clear what will be in the resulting numerator and what will be the the denominator. Factor everything, so you'll be working with parentheses factors rather than trying to multiply x^2 times x^2 and getting higher exponents. Once things are totally factored, you can cross out any factors that are the same in top and bottom.
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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 (10)
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Multiplying and Dividing Rationals
Problem 1 6,005 viewsMultiply and simplify your answer.
3xy² ⋅ 4x³z 10y³ x³z³ 
Multiplying and Dividing Rationals
Problem 2 4,594 viewsMultiply and simplify your answer.
x + 3 (5x² + 10x) 5x² 
Multiplying and Dividing Rationals
Problem 3 4,378 viewsMultiply and simplify your answer.
m² + 5m + 6 ⋅ m² − 2m − 3 m − 3 m² + 3m + 2 
Multiplying and Dividing Rationals
Problem 4 4,021 viewsDivide and simplify your answer.
5t² + 10t − 15 ÷ 2t² + 7t + 3 5 − 6t + t² 4t² − 8t − 5 
Multiplying and Dividing Rationals
Problem 5 586 views 
Multiplying and Dividing Rationals
Problem 7 661 views 
Multiplying and Dividing Rationals
Problem 8 575 views 
Multiplying and Dividing Rationals
Problem 9 561 views 
Multiplying and Dividing Rationals
Problem 10 589 views 
Multiplying and Dividing Rationals
Problem 11 534 views
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