# Thread: Is there a simple way to solve this or do you need approximation?

1. ## Is there a simple way to solve this or do you need approximation?

I need to solve ((-3/2)*b^(2/3))+b=-5/16
for b.

I know the answer should be around .199, but is there an easy way to solve it? I tried to factor out a b, but got a different answer that did not make sense. Anyone know how to solve it? Thanks.

2. Hello,

By letting $x=b^{1/3}$, you can use these completely insane formulae : Cubic function - Wikipedia, the free encyclopedia