# Thread: Simplify the following expression:

1. ## Simplify the following expression:

2st/s2 − t2+1/s+t − 4/s−t

2. ## Re: Simplify the following expression:

Do you mean s^2 and t^2 instead of s2 and t2 ?

Do you understand that s/s^2 = 1/s ?

3. ## Re: Simplify the following expression:

Here is the problem:

4. ## Re: Simplify the following expression:

Originally Posted by cwall
2st/(s^2 − t^2) + 1/(s + t) − 4/(s − t)
in future, use parentheses to group terms and carets (^) to indicate exponents ...

common denominator is $s^2-t^2 = (s+t)(s-t)$ ...

$\dfrac{2st}{s^2-t^2} + \dfrac{s-t}{s^2-t^2} - \dfrac{4(s+t)}{s^2-t^2}$

... take it from here?

5. ## Re: Simplify the following expression:

I'm getting answer of (2st + 5s + 3t) / (s^2 - t ^ 2).

Is that accurate?

6. ## Re: Simplify the following expression:

Originally Posted by cwall
I'm getting answer of (2st + 5s + 3t) / (s^2 - t ^ 2).

Is that accurate?
$\dfrac{2st+(s-t)-4(s+t)}{s^2-t^2}$

try again ...

7. ## Re: Simplify the following expression:

Example:
-a(b + c) = -ab - ac
Hokay?