edmar Posts: 1, Reputation: 1 New Member #1 Sep 6, 2007, 10:32 PM
Rational Expressions
This is a Rational Expression

 Capuchin Posts: 5,255, Reputation: 656 Uber Member #2 Sep 6, 2007, 11:40 PM
$\frac{2}{x+1}+\frac{1}{x-1}$

You need to get the denominators the same, you can do this by multiplying either term by 1 (anything with the same numerator and denominator):

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

Can you take it from here?
 s_cianci Posts: 5,472, Reputation: 760 Uber Member #3 Sep 8, 2007, 10:34 AM
You need a common denominator. Determine the LCD for x + 1 and x - 1. Multiply each of the original numerators by the missing factor in the original denominator. Then combine the terms in the numerator.

 Question Tools Search this Question Search this Question: Advanced Search

## Check out some similar questions!

sumone help me simplify these? The "^" means to the power of the number that follows it √54x^3y^5 2√12x^4y^5 0.5√8x^4y^3 3√75x^3y^5

+ and - rational expressions [ 2 Answers ]

I need help with some questions so if u could help that would be greatly appreciated! :D 1) 8/7v-6 + 4/ 3v^2 2) 7x/2x - x-2/ 20x +16 THANK YOU VERY MUCH:D Lizzie

Evaluating Expressions [ 1 Answers ]

How do you answer Evaluate P(9,6) Or Evaluate C(7,5) I have no idea what I'm supposed to do.

Rational expressions and complex fractions [ 1 Answers ]

I'm crap at math to I have a test today about rational expressions and comples fractions CAN U HELP? HOW DO I SOLVE THESE?