# Simplifying an expression

1. May 28, 2013

### Femme_physics

My basic math is failing me again :(

My attempt to simply:
[Broken]

My teacher's attempt:
[Broken]

Ignore the difference in notation. He writes || which signifies (A x B) / (A + B) = A || B

And yes I'm aware there is more to simplify but I fail to follow him on the first step

Last edited by a moderator: May 6, 2017
2. May 28, 2013

### haruspex

I take it R, S and C are three separate variables.
In $\frac{\frac{R}{SC}}{R+\frac1{SC}}$, multiply top and bottom by SC.

3. May 28, 2013

### Femme_physics

Ahh...thank you, I should've seen it!