# Math

posted by .

x^2-x-12/x^2-3x-4*x^2-1/x^2+2x-3

• Math -

When simplifying rational expressions you need to factor all the numerators & denominators (if possible):
x^2-x-12 --> (x-4)(x+3)
x^2-3x-4 --> (x-4)(x+1)

x^2-1 -----> (x+1)(x-1)
x^2+2x-3 --> (x+3)(x-1)

Therefore you will have:
(x-4)(x+3)*(x+1)(x-1)
(x-4)(x+1) (x+3)(x-1)

You can then cancel out all common factors that appear on top and bottom. If you notice, for every factor on top, there is a match on the bottom. THus, everything cancels out leaving you with a final answer of 1!

## Similar Questions

1. ### math

The equation d =70t represents the distance in miles covered after traveling at 70 miles per hour for t hours.....what is d when t = 2.5?
2. ### Algebra

Rationalize the denominator. Assume that all variables are positive. 5x^4y/2x^2y^3 There are square root signs around both parts of the fraction, but I cannot make them on the computer. Thanks in advance. are u using the carrot symbols …

4. ### math

Can somebody PLEASE help me understand how to find the domain of a function. I have an F in algebra 3 and just got a 50% on my math quiz. I'm desperate!

6. ### I'm in desperate need of h

I'm in desperate need of help for a huge titration lab and finding the molarity. if I give you the problem could you help?
7. ### Math help

How would you solve these systems by elimination?
8. ### Math Help

In desperate need of help! solve by factoring. 1. x^2=-25+10x 2. 2x^2+9x=5 3. The length of a square is 4x-3. Find the area in terms of x.
9. ### MATH HELP

In desperate need of help! solve by factoring. 1. x^2=-25+10x 2. 2x^2+9x=5 3. The length of a square is 4x-3. Find the area in terms of x.
10. ### POLS210 D001

Please I am in desperate need of finding the answer to pop quiz 4,6,and 8 please is there anyone out there that could help me.

More Similar Questions

Post a New Question