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#1 2012-10-20 18:49:48
- Harold
- Guest
Cubic equation
How do i solve a equation of this form ax^3+bx^2+cx+d=0 is there a formula?please explain
#2 2012-10-20 19:34:50
- bobbym
- Administrator
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Re: Cubic equation
Hi Harold;
Yes, there is a formula but no one ever uses it.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#3 2012-10-20 19:45:15
- zetafunc.
- Guest
Re: Cubic equation
It would be helpful to remember but you're unlikely to use it very often. Try to find the first by inspection (or iteration if you have a calculator), then determine the quadratic factor from there.
#4 2012-10-20 19:53:55
- bob bundy
- Moderator
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Re: Cubic equation
hi Harold,
Have a look at:
http://www.mathisfunforum.com/viewtopic.php?id=17660
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#5 2012-10-21 07:32:14
- bobbym
- Administrator
Offline
Re: Cubic equation
Or one even nastier than that.
http://www.mathisfunforum.com/viewtopic … 00#p198900
See post#6.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.