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Topic: Finding roots of cubic symbolic polynomials
Replies: 8   Last Post: Aug 13, 2014 10:54 AM

 Messages: [ Previous | Next ]
 Steven Lord Posts: 2,237 Registered: 9/26/13
Re: Finding roots of cubic symbolic polynomials
Posted: Aug 13, 2014 9:38 AM

"Sanaa " <findingsanaa@yahoo.com> wrote in message
news:lsfopu\$kg6\$1@newscl01ah.mathworks.com...
> "Nasser M. Abbasi" wrote in message <lsflaa\$k11\$1@speranza.aioe.org>...
>> On 8/13/2014 7:08 AM, Sanaa wrote:
>> > Hi,
>> > I need to calculate the roots of a cubic symbolic polynomials. It
>> > contains 7 parameters.
>> > Any help is appreciated.
>> > Thank you
>> >

>>
>> help solve

> function sols = solve_cubic( segma, beta, mu, nu, delta, gamma)
> syms lambda sols =
> solve(lambda^3+lambda^2*(nu*mu+delta*mu+gamma*mu+segma*beta*mu+mu^2)+lambda*(delta*mu^2+gamma*mu^2+nu*gamma*mu+segma*gamma*mu-segma*mu*beta))
> end

Show the group EXACTLY how you called solve_cubic and the FULL text of any
error or warning messages you received. The group should be able to call
solve_cubic using ONLY your instructions on how to call it.

--
Steve Lord
slord@mathworks.com
http://www.mathworks.com

Date Subject Author
8/13/14 Sanaa
8/13/14 Nasser Abbasi
8/13/14 Sanaa
8/13/14 Nasser Abbasi
8/13/14 Steven Lord
8/13/14 Sanaa
8/13/14 Steven Lord
8/13/14 Sanaa
8/13/14 Nasser M. Abbasi