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OpenStudy (anonymous):
Explain how to add and subtract rational expressions with unlike denominators.
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OpenStudy (hoblos):
we must first find the common denominator which is the LCM of the two denominators , then we add or subtract the numerator
OpenStudy (anonymous):
thats all
OpenStudy (hoblos):
if we have for example |dw:1395235011908:dw| the LCM is bd
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