evryothrsnisused said:
i need help on a couple of problems...
the first one is (1/y-x)+(x/(x-y)^2)
the second one is ((x+y)/(x-y))^2-1
Does your problem look like:
\(\displaystyle \frac{1}{y} \, - \, x \, + \, \frac{x}{(x \, - \, y)^2}\)
That is what you wrote.
If you meant to write:
\(\displaystyle \frac{1}{y \, - \, x} \, + \, \frac{x}{(x \, - \, y)^2}\)
then you should have written:
1/(y-x) + x/(x-y)^2
Assuming it is the second form following are some hints
Re-write (x-y)^2 as (y-x)^2 -- because those are equal.
Then treat those as if you are doing a numerical fraction addition.
So the next step would be - what is the Lowest-common-multiple (LCM some times called LCD) of the denominators.
Multiply and divide by appropriate expressions - so that the denominators are equal (just like you would do to find 1/2 + 1/3 without a calculator).
Then do the addition and simplify.
If you are still stuck write back showing your work and tell us exactly where you are stuck.
