Do you mean ?

This is a quadratic equation in . To make it easier substitute to give

(2u-1)(u+2) = 0 so u = 0.5 or u = -2

ie: in which case we can take the reciprocal of both sides to give us . You'll get an error if you try solving so this is not a real solution.

Again take the reciprocal to give

this gives and

This is the only solution if I've plotted my graph right