SOLUTION: how would u add 4/x^3y + 7/xy^2?

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Question 4624: how would u add 4/x^3y + 7/xy^2?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
you would add them as you would any fractions...look for the lowest common multiple etc.

So, 4%2Fx%5E3y+%2B+7%2Fxy%5E2 will need x%5E3y%5E2 as the denominator. If this is so, then the first term will have to be multiplied by y/y (ie 1) and the second term will have to be multiplied by x%5E2%2Fx%5E2, as:

%284%2Fx%5E3y%29%28y%2Fy%29+%2B+%287%2Fxy%5E2%29%28x%5E2%2Fx%5E2%29

%284y%2Fx%5E3y%5E2%29+%2B+%287x%5E2%2Fx%5E3y%5E2%29

giving your answer --> %28%284y%2B7x%5E2%29%2Fx%5E3y%5E2%29

jon