# Math Help - Explain how this equals this

1. ## Explain how this equals this

This a homework problem can someone explain how this

$\frac{t-\frac{1}{t}}{2}$

equals this

$\frac{t^2-1}{2t}$

2. make a common denominator for the numerator fraction

x - (1/x)

common denominator is x, so..

((x^2 - 1) / x) all divided by 2, so..

(x^2 - 1 /2x)

3. Hello, sk8erboyla2004!

Can someone explain how . $\frac{t-\frac{1}{t}}{2}$ .equals . $\frac{t^2-1}{2t}$

Multiply by $\frac{t}{t}\!:\quad\frac{t}{t}\cdot\frac{t - \frac{1}{t}}{2} \;=\;\frac{t^2-1}{2t}$

4. well sure if you wanna do it the eeeasy way