# Polynomial

• Nov 6th 2012, 02:32 PM
simonsays
Polynomial
I'm getting stuck on a simple problem:

(1 / (x+3)) + (1 / (X^2+5x+6)

I have two ways of doing this where I can factor out the 1 / (X+3) or I can multiply the numerator to get (X+2)(X+3). Can someone show me the steps to get to the correct answer?
• Nov 6th 2012, 03:26 PM
skeeter
Re: Polynomial
$\frac{1}{x+3} + \frac{1}{(x+2)(x+3)}$

common denominator ...

$\frac{x+2}{(x+2)(x+3)} + \frac{1}{(x+2)(x+3)}$

$\frac{(x+2)+1}{(x+2)(x+3)}$

$\frac{x+3}{(x+2)(x+3)}$

$\frac{1}{x+2}$

note restrictions ... $x \ne -2 \, , \, x \ne -3$
• Nov 6th 2012, 03:37 PM
simonsays
Re: Polynomial
Thanks! That's what I originally had and saw there was another way to solve by factoring:

(1/(X+3))(1+(1/(X+2)) which solves out to 1/(X+2) as well.