Hi,

I have the following expression:

$\displaystyle \frac{V^2(R_t +R_L)^2 -2V^2R_L(R_t + R_L)} {(R_t+R_L)^4}=0$

I need to solve for $\displaystyle R_L$

If you multiply the whole expression by: $\displaystyle (R_L + R_t)^4$

That part just disappears?

Maybe it's easier to just cancel out the (R_t +R_L) parts?

So you have $\displaystyle \frac{(V^2-2V^2R_L)}{(R_t + R_L)}=0$

but then what?

//Jones