SOLUTION: Pls. help to rationalize the numerator for ( ³√x-³√a ) / ( x-a ) (the numberator is cube root x and cube root a)

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Question 390574: Pls. help to rationalize the numerator for
( ³√x-³√a ) / ( x-a )
(the numberator is cube root x and cube root a)
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!


Let , then 
Let , then 

Substituting:



Factor the denominator as the difference of two cubes:



Cancel the 's





Substitute 
Substitute 






Edwin
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