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Adding and Subtracting Rational Expressions - Problem 4

Teacher/Instructor 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

If two fractions are to be combined, they must first have the same denominator. These examples already have common denominators, so we will be focusing on how to properly combine the numerators, factor, and reduce if possible. Many errors are made with subtracting, so be very careful with distributing a negative sign. Domain restrictions are any x values that would make the denominator equal to zero.

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