I cannot factor it and I want the x-values to be in fractions. Please help.

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- Oct 14th 2007, 02:45 PMfunzone36X^3-5x^2+11=0, x=?
I cannot factor it and I want the x-values to be in fractions. Please help.

- Oct 14th 2007, 03:01 PMThePerfectHacker
- Oct 14th 2007, 03:57 PMfunzone36
The rational root theorem doesn't work. ± 1/1 and ± 11/1 all do work to make x = 0. So in the end, there's no accurate way to solve for x?

- Oct 14th 2007, 04:02 PMtopsquark
There's Cardano's method if you really really really need the exact answer. But I'd recommend that you eat a lot of carbohydrates before you attempt it because it's going to take a lot of effort.

I'd stick with an approximation method.

-Dan