polyroots() fcn not working correctly?

[gLanzer]

hi guys,

i can't figure out what i did wrong..

(or it's just mathcad's fault?)

polyroots() seems to be giving incorrect answers..

attached is the worksheet i made

btw, mathcad15 here.

thanks..

[RichardJ]

You have the coefficients reversed. For your vector, V, try polyroots(reverse(V)).

You should always check the order of coefficients for anything to do with polynomials. Even for only one independent variable the they could be ordered high to low or low to high. If you have more than one one independent variable then the coefficients could be ordered in many different ways!

[jeanGiraud]

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[gLanzer]

thank you guys.