complex fraction anyone?
(x^-2 - 9y^-2)/(5y-15x)
help please

Question

turingtest · Answer

we're trying to simplify this?

anonymous · Answer

yes, i've come up with (15y^2 - 135x^2)/(3x^2y - xy^2)

jhonyy9 · Answer

1/x2 - 9/y2
-----------
   5(y-3x)

turingtest · Answer

anonymous · Answer

@jhonyy9 that's not it

turingtest · Answer

starting with difference of squares on the top doesn't seem to work

turingtest · Answer

the answer is on the link I posted
jhonny just got it started for you

anonymous · Answer

I already tried Wolfram but I don't understand it.

jhonyy9 · Answer

y2 -9x2
--------
   x2y2
---------
5(y-3x)

turingtest · Answer

at least you have the answer, I'm trying to figure out how they got it too...

turingtest · Answer

oh jhonny's onto something... let him continue

jhonyy9 · Answer

y2 -9x2          1
------- * ---------
  x2y2        5(y-3x)

turingtest · Answer

difference of squares and we're done, right?

jhonyy9 · Answer

(y-3x)(y+3x)            1
----------- * -----------
    x2y2              5(y-3x)

turingtest · Answer

y-3x cancels and we get wolf's answer!

jhonyy9 · Answer

(y+3x)
--------
   5x2y2

turingtest · Answer

I hate algebra sometimes...

jhonyy9 · Answer

thats A

jhonyy9 · Answer

A

jhonyy9 · Answer

ALL

turingtest · Answer

nice :)

jhonyy9 · Answer

thank you

anonymous · Answer

thank you

jhonyy9 · Answer

yw