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little algebra problem

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Chrill3

Joined Mar 8, 2010
9
I have struggled a while with this one. I dont understand how it comes like this, from the beginning I have R2/(R2+R1+(1/x)) → (x*R2)/(1+x(R2+R1))
if someone can show me how it can change i will be very glad.
 
Last edited:
t_n_k

t_n_k

Joined Mar 6, 2009
5,455
It can't - plug in some real values for R1, R2 and x and you'll find the two forms are different.

e.g. let x=5, R1=2 & R2= 3

R2/(R1+R2+x)=3/10

but

x*R2/(1+x(R1+R2))=5*3/(1+25)=15/26
 
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