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#2 Re: Help Me ! » Help with Cardano's method solving cubic » Today 05:30:11

Hi;

Over here they discuss a similar problem that may give you some ideas.

http://math.stackexchange.com/questions … os-formula

I do not think any of those methods were known to Cardano.

What was the cubic if he was able to reduce r and s to numbers?

#10 Re: Help Me ! » Help with Cardano's method solving cubic » Yesterday 17:22:29

Hi;

Did you get how he got u^3 and v^3 on the next line?

#11 Re: Ganesh's Puzzles » General Quiz » Yesterday 17:11:22

Hi;

Thanks for the condolences, it was a long time ago.

#14 Re: Help Me ! » Help with Cardano's method solving cubic » Yesterday 05:47:05

Hi;

Cardano, using the method that falsely bears his name did not know about complex numbers so he would assume that the roots are real. Check this page out and tell me exactly where you are stuck.

http://en.wikipedia.org/wiki/Cubic_function

About 1 / 3 down the page is his method.

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