can someone please simplify this??
9x²-15xy
------------- (divided by)
9x²-25y²
please show work!!
thanks
2006-11-26 06:08:11 · 7 answers · asked by Fuzzyglasses 3 in Education & Reference ➔ Homework Help
Factor out first........
3x(3x-5y)
__________
(3x-5y)(3x+5y)
Cancel: the 3x-5y goes away both top and bottom. That should give you a hint as to what to do next.
2006-11-26 06:12:37 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1) Factor
9x²-15xy
-------------
9x²-25y²
2) Check you work so far. 3x(3x)=9x^2 3x(-5y)=-15xy
wich matches your first equation
9x^2-15xy
3x(3x)=9x^2 -5y(5y)=-25y^2
which matches your second equation under the divishion bar
9x^2-25y^2
your new equation looks like this
3x(3x-5y)
---------------------
(3x-5y)(3x+5y)
The 3x-5y can be eliminated from both the top and the bottom of the equation. Once you have eliminated them the aswer will look like so.
3x
------------
(3x+5y)
(I cant belive I took the time to answer that question. Its good practice for my math test Monday though! Plus I am waiting for some good Karma to come my way.)
2006-11-26 06:26:58 · answer #2 · answered by I <3 Animals 5 · 0⤊ 0⤋
um... x & y are unknown, 9 multaplyied by x multaplyied by x (itself) minus15 multaplyied by x multaplyed by y divided by 9 multaplyied by x multaplyed by x (itself) minus 25 multaplyied by y multaplyied by y (itself ). you need to find what x and y are.
Sorry if that confusedf you, it allmost confused me!
p.s. I am 14
2006-11-26 06:21:31 · answer #3 · answered by iduno23 1 · 0⤊ 0⤋
-15xy
---------divided by
-25y^2
2006-11-26 07:30:42 · answer #4 · answered by Shaniqua 3 · 0⤊ 0⤋
I second snowy's answer.
2006-11-26 06:17:01 · answer #5 · answered by answers 3 · 0⤊ 0⤋
3x(3x-5y)
------------
(3x-5y)(3x+5y)
= 3x/(3x+5y)
2006-11-26 06:10:56 · answer #6 · answered by snow l 3 · 1⤊ 0⤋
?!?!?!?
2006-11-26 06:09:14 · answer #7 · answered by Sabrina C 2 · 0⤊ 1⤋