Again, to factorize; not solve..
*Not too sure about this step, went off-track here, i think..
Didn't you PREVIEW your post?
You didn't see that it didn't come out clearly?
And how did you manage to factor out ? . . . And why?
Like Plato, I'll guess at what you meant.
Take another look at what we have: .
. . and that's the best we can do.