4xy/x^2-y^2 + x-y/x+y the answer is x+y/x-y im completely lost on this particular problem. if someone can point me in the correct direction here that would be great, somehow i got 4+x-y/(x-y)^2
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Originally Posted by NecroWinter 4xy/x^2-y^2 + x-y/x+y the answer is x+y/x-y im completely lost on this particular problem. if someone can point me in the correct direction here that would be great, somehow i got 4+x-y/(x-y)^2 note that the common denominator is
simplify the numerator..
Originally Posted by harish21 simplify the numerator.. im a little confused the only thing i would know to do is to start cancelling things out when i see (x-y)^2 i assume (x+y)(x-y) and i can cancel out the denom and be left with 4xy.
Originally Posted by NecroWinter im a little confused the only thing i would know to do is to start cancelling things out when i see (x-y)^2 i assume (x+y)(x-y) and i can cancel out the denom and be left with 4xy. numerator ...
Originally Posted by skeeter numerator ... thanks i get it now but i have one more small question when you have (x-y)^2 how do you know that it isnt a difference of two squares, but rather a perfect square trinomial?
Originally Posted by NecroWinter thanks i get it now but i have one more small question when you have (x-y)^2 how do you know that it isnt a difference of two squares, but rather a perfect square trinomial? a difference of two squares is , not , which is the square of a difference.
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