Hi,

Can this formula be simplified?

x = (d/(a-b)) - (d/a)

Any help would be much appreciated...

Thanks,

Chris

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- Jun 26th 2012, 04:40 AMcjcassHelp needed to simplify a formula - this is probably easy!!!
Hi,

Can this formula be simplified?

x = (d/(a-b)) - (d/a)

Any help would be much appreciated...

Thanks,

Chris - Jun 26th 2012, 04:50 AMReckonerRe: Help needed to simplify a formula - this is probably easy!!!
- Jun 26th 2012, 04:54 AMcjcassRe: Help needed to simplify a formula - this is probably easy!!!
Hi,

I'm not a mathematician so could you please give me the result.

Many thanks in anticipation,

Chris - Jun 26th 2012, 05:08 AMcjcassRe: Help needed to simplify a formula - this is probably easy!!!
Sorry, hope I didn't come across rude in my last reply!!

- Jun 26th 2012, 05:33 AMReckonerRe: Help needed to simplify a formula - this is probably easy!!!
Well, I'm not going to do your work for you. If you really have no idea what to do, you might want to try to find a tutorial online. I found this on Google, it covers addition and subtraction of rational expressions towards the bottom.

For your problem, note that our lowest common denominator is $\displaystyle a(a - b).$ We need to get this denominator in both fractions. To do that, we should multiply the numerator and denominator of the first fraction by $\displaystyle a,$ and we multiply the numerator and denominator of the second fraction by $\displaystyle (a-b).$ - Jun 26th 2012, 05:41 AMcjcassRe: Help needed to simplify a formula - this is probably easy!!!
Ok, now I'm with you - many thanks for your help!!