Factorize #7 y^3 (9 y-4) + 9 y - 4# ?
but any odd order polynomial has at least one real root. In this case is
equating for all
I'm going to rewrite this to group together the final two terms:
and now factor out the
We can't do anything with either term that will make this neater or easier to understand, so I'll leave it here.