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

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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

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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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