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Solving a Rational Equation  Problem 5
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
Many students find cross multiplication a useful tool in solving equations with rational functions, but it is often used at inappropriate times. Cross multiplication is only possible when you have a proportion, or fraction equals fraction. Here we look to get the terms with the same denominators on the same side of the equals to turn them into one fraction, and then cross multiply. As always with rational functions, don't forget to check for extraneous solutions.
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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 (6)
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Solving a Rational Equation
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3 − 1 = 2 x + 2 x − 2 x² − 4 
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Problem 2 4,912 viewsSolve:
2 = 1 − 6x 3x + 1 x 3x + 1 
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Problem 3 1,155 views 
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Problem 5 1,043 views 
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Problem 6 885 views
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