hmm, cubic polynomial... unless we know the values of either x or abc. then it can only be done :P
usually in mathematics, it's done through ab + bc + cd = c/a
I doubt if that code from jaScript is correct cos that's not the expected answer. I substitute x for all the results and none is equal to zero as claimed by the equation. However, i'd suggest you learn a equations like this from some online math tutorials, then you can write them as code
