That's a cubic equation: .[/tex]
If I'm right so far how do I solve for h?
There is a general formula but it is very complex. The "rational root theorem" says that any rational roots must be of the form a/b where a divides the constant term, 5, and b divides the leading coefficient, 2. That means that, for this equation, the only possible rational roots are , , , and . There is no guarentee that this equation has a rational root but I recommend trying those to see. If none of those work, there is no simpler solution than the cubic formula.