# Equation simplification

1. Dec 2, 2009

### SJB

Hi,

Thanks for taking the time to look at my problem.

I'm following a worked example in a text book and I have come to a line of simplification which I just can't see how/what they've done? I've attached a .jpg showing the two lines of simplification.

Making this simplification helps with integration later on but that's not relevant to this...

Any help would be much appreciated!

Thanks

Simon

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2. Dec 2, 2009

### Gerenuk

$$(L-x)=L\left(1-\frac{x}{L}\right)=L\left(2-\frac{x}{L}-1\right)=L\left(2\left(1-\frac{x}{2L}\right)-1\right)$$

3. Dec 2, 2009

### SJB

Hello Gerenuk,

Brilliant..... Thank you very much indeed, I'd spent all day banging my head on the desk over this. I kept trying to expand everything out and group back together again which was pretty stupid I guess....

Thank you again for your help

Simon