# Polynomial

Renard Sild

Greenhorn

Posts: 1

posted 7 years ago

Below I tried to describe a complex polynomial which is a part of my newton method. When I define the complex number x, for example x = new ComplexNumber (0,0), it doesn't return the right value. Also I have overriden the basic string format to make it look like a complex number, but it doesn't show. It does show if I perform an arithmic operation like when I test a method. As a beginner I am clueless.

btw all methods for the complex arithmetic operations are defined and tested, ComplexNumber(real part, imaginary part)

note: My first attempt I tried to split the polynomial into a real and an imaginary part, but that doesn't work well when the root is also a complexnumber... So I moved on to the above.

btw all methods for the complex arithmetic operations are defined and tested, ComplexNumber(real part, imaginary part)

note: My first attempt I tried to split the polynomial into a real and an imaginary part, but that doesn't work well when the root is also a complexnumber... So I moved on to the above.

Campbell Ritchie

Sheriff

Posts: 50702

83

posted 7 years ago

Welcome to JavaRanch

Please go through that expression and work out what sort of algebraic formula it corresponds to. Use a pencil and paper and work from right to left; every time you reach a dot put round brackets () around your expression. See whether that gives the correct formula.

I don't understand the bit about "String". Do you mean what you get when you print the ComplexNumber to screen?

Please go through that expression and work out what sort of algebraic formula it corresponds to. Use a pencil and paper and work from right to left; every time you reach a dot put round brackets () around your expression. See whether that gives the correct formula.

I don't understand the bit about "String". Do you mean what you get when you print the ComplexNumber to screen?