# simplifying rational expressions!! ?

• Oct 19th 2008, 03:43 AM
muffledmath
simplifying rational expressions!! ?
x³-2x²-5x+6 / x² - x -6

i tried grouping but it didnt work...... o_o please help (Doh)
• Oct 19th 2008, 04:54 AM
ticbol
Try long division.
• Oct 19th 2008, 05:19 AM
thisisme
Factorise the top and bottom to get: (x-3)(x+2)(x-1)/(x-3)(x+2) then cancel out the like factors.
• Oct 19th 2008, 06:37 AM
muffledmath
where did you get (x-3) ??
• Oct 19th 2008, 06:41 AM
vincisonfire
If you have a polynomial of form
an * x^n + ... + m then the roots are in the set
±m
----
±n
Here they are ±1 ±2 and ±3.
That's a way to find it. You try them and keep the one that works.
• Nov 27th 2012, 03:43 AM
edmundyong
Re: simplifying rational expressions!! ?
I tried long division and it works. I get (x-1)
• Nov 27th 2012, 06:19 AM
skeeter
Re: simplifying rational expressions!! ?
Quote:

Originally Posted by edmundyong
I tried long division and it works. I get (x-1)

why are you responding to a thread that is over 4 years old?