Adding Rational Expressions with Different Denominators

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Learn how to add rational expressions. These problems involve having denominators that are unlike. First, factor the denominators and then see if you have any common factors.
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Why did you forget 21 in the first equation?

josefbagsic
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I wouldn't use this video to learn, you'll drive yourself nuts trying to figure out why she forgot the -21!!

melissawelch
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Please fix this video because you forgot the -21 in the numerator.

rebeccagonzales
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You missed out the -21 in the first equation

Abettertomorrow
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do i need to factoring the answer too?

jc.