# Homework Help: I need help with this problem

1. Jan 30, 2007

### afcwestwarrior

9-t/3-squared t x 3 + square t/3+square t

i get on top 27+9square t -3t-t square t/9-3square t- 3 square t + t

i forgot what happens when u rationa,ize sqaure roots like this

2. Jan 30, 2007

### afcwestwarrior

i need help man, any one know how to add square roots such as 3 square root 5 + 3 square root 7,

3. Jan 30, 2007

### afcwestwarrior

this doesn't make sense because whenever i plug in the 9 i get 3 and the answer is 6, it doesn't make sense.

4. Jan 30, 2007

### theperthvan

What does the first post say, it's not clear?

5. Jan 31, 2007

### HallsofIvy

Actually NONE of these make sense!
If you aren't going to use Latex at least use parentheses to clarify- and "t^2" is clearer than "square t".
I think you mean (9- 3t)/(3-3t^2)+ t^2/(t^2+3). Can you factor 3-3t^2? Get the lowest common denominator and add.

$3\sqrt{5}+ 3\sqrt{7}$? About the only thing you can do is factor out the three: $3(\sqrt{5}+ \sqrt{7})$. There is no way to "add square roots" of different numbers.

Plug 9 into what? What are you talking about?

6. Feb 1, 2007

### afcwestwarrior

i figured this one out already, i didn't mean 3 squared i meant the square root of 3