hi,
whats the solution to
\(\sqrt[3]{2+i11}\)?

help is greatly appreciated.
thank u.

 

Is that a homework question? Care to post the whole of the question?

 

±hi georacer,
its not homework but m doing self study on basic maths related to signals & systems.

the eq is \(^{x^3-15x-4=0}\)
then x=\(\sqrt[3]{2+\sqrt{-121}}\)+\(\sqrt[3]{2-\sqrt{-121}}\)

(2±i)\(^{3}\)=2±i11=2±\(\sqrt{-121}}\)

x=(2+i)+(2-i)=4

i m wondering what method to arrive at the last stage.

hope someone shed lite on that.
thanks

Is that a homework question? Care to post the whole of the question?

 

Check this out: http://www.suitcaseofdreams.net/Roots_complex.htm

I found it very useful. From a quick google search I did, I saw that this is the most popular formula.