# Dividing Polynomials

• Sep 9th 2008, 02:46 PM
emximer
Dividing Polynomials
• Sep 9th 2008, 03:21 PM
ticbol
Quote:

Originally Posted by emximer

Are you dividing or subtracting?

As posted, you are subtracting.
Facor the two denominators. The 1st one will become (x+3)(x+2). The 2nd one will be (x-5)(x+2). So your common denominator will be (x+3)(x+2)(x-5).
Then the answer will be (-2) / (x+3)(x+2)(x-5).

If you are dividing,
You still have to factor the two denominators, then, as usual, invert the divisor so that you can just multiply instead of dividing.
• Sep 9th 2008, 03:47 PM
emximer
Quote:

Originally Posted by ticbol
Are you dividing or subtracting?

As posted, you are subtracting.
Facor the two denominators. The 1st one will become (x+3)(x+2). The 2nd one will be (x-5)(x+2). So your common denominator will be (x+3)(x+2)(x-5).
Then the answer will be (-2) / (x+3)(x+2)(x-5).

I was subtracting, just got a little confused there. Thanks for the help, I messed up on the LCD, however the correct answer (according to this online homework site) has http://webwork1.math.utah.edu/webwor...3777030c51.png in the top, not a -2.

Thanks big time though!(Rofl)
• Sep 9th 2008, 10:30 PM
ticbol
Quote:

Originally Posted by emximer
I was subtracting, just got a little confused there. Thanks for the help, I messed up on the LCD, however the correct answer (according to this online homework site) has http://webwork1.math.utah.edu/webwor...3777030c51.png in the top, not a -2.

Thanks big time though!(Rofl)

Er, yes, x -5 -(x +3) = -8. Not -2.