# rational expressions #3

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• Jul 24th 2013, 09:56 PM
Prove It
Re: rational expressions #3
You could if \displaystyle \displaystyle \begin{align*} \frac{t}{t - 6} - \frac{1}{t} \end{align*} was equal to \displaystyle \displaystyle \begin{align*} \frac{t - 1}{t(t - 6)} \end{align*}. Go back and reread what I wrote in post 10. When you try to get a common denominator, what you do to the bottom of each fraction you also need to do to the top!
• Jul 26th 2013, 12:55 PM
Mathnood768
Re: rational expressions #3
i asked this question 3 days ago, im just going to give up. sometimes there are people that just post the steps and its easy to compare what i did wrong with the correct steps, i guess their not coming here.
• Jul 26th 2013, 02:27 PM
ChessTal
Re: rational expressions #3
Quote:

Originally Posted by Mathnood768
i asked this question 3 days ago, im just going to give up. sometimes there are people that just post the steps and its easy to compare what i did wrong with the correct steps, i guess their not coming here.

Well i don't know why you give up or why you don't understand it.
a)To add 2 or more fractions they must have the same denominator.
b)If you multiply with the same non-zero number the numerator and the denominator the value of the fraction remains the same.

Simple as that.
So \displaystyle \displaystyle \begin{align*} \frac{t}{t - 6} - \frac{1}{t} \end{align*} does not have the same denominator.
So we should just make it have(in order rule a) to be true).

How? With the help of rule b).
So we multiply \displaystyle \displaystyle \begin{align*} \frac{t}{t - 6} \end{align*} with t both the numerator and denominator.
And also we multiply \displaystyle \displaystyle \begin{align*} \frac{1}{t} \end{align*} with t-6 both the numerator and denominator.

After we do this, we add the numerators to get the new single numerator of our new fractions and the final single fraction has the same denominator.
• Jul 26th 2013, 05:01 PM
Prove It
Re: rational expressions #3
Quote:

Originally Posted by Mathnood768
i asked this question 3 days ago, im just going to give up. sometimes there are people that just post the steps and its easy to compare what i did wrong with the correct steps, i guess their not coming here.

You've been given PLENTY of help so far. Read the responses you have been given, and try to follow the advice that you have been given. We are NOT going to provide full solutions, as it is expected that you do your work YOURSELF.
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