1. ## [SOLVED] Homogenous ODE Help

Hi There !

Can someone please explain how the yellow highlighted steps were derived from the previous step? I just cant seem to convert [(u-1)/(u+1)]-u into the yellow step.

Thanks ALOT !

Dave

Help.pdf

2. ## Re: Homogenous ODE Help

Originally Posted by dangerdaveuk
Hi There !

Can someone please explain how the yellow highlighted steps were derived from the previous step? I just cant seem to convert [(u-1)/(u+1)]-u into the yellow step.

Thanks ALOT !

Dave

Help.pdf
algebra?

$\frac{u-1}{u+1}-u=\frac{u-1}{u+1}-\frac{u+1}{u+1}u=\frac{(u-1)-(u^2+u)}{u+1}=\frac{u-1-u^2-u}{u+1}$

3. ## Re: Homogenous ODE Help

Thanks alot romsek .. no explanation for my stupidity here!