how to write polynomial code

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Ahmad Dalabeeh
Ahmad Dalabeeh 2017-10-21
回答： Krishan Kumar 2020-9-28
how to write a code that:
- Reads any polynomial P
- Finds its roots.
- Shows the degree of the polynomial.
- Calculates P^3 - Plots the polynomials P and P^3 on a suitable domain specified by the user

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采纳的回答

Birdman
Birdman 2017-10-21
syms x
p(x)=x^2+2*x-3;%as an example
Coeff=coeffs(p(x))';
Coeff=wrev(Coeff);
Roots=roots(Coeff);%roots
Degree=length(Coeff)-1;%degrees
disp(p^3)%calculates p^3
x=0:0.1:1;
plot(x,p(x));grid on;%plots
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Birdman
Birdman 2017-10-21
Thank you Walter, nice to learn.
Ahmad Dalabeeh
Ahmad Dalabeeh 2017-10-21
thank you very much brothers

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Krishan Kumar
Krishan Kumar 2020-9-28
syms x p(x)=x^2+2*x-3;%as an example Coeff=coeffs(p(x))'; Coeff=wrev(Coeff); Roots=roots(Coeff);%roots Degree=length(Coeff)-1;%degrees disp(p^3)%calculates p^3 x=0:0.1:1; plot(x,p(x));grid on;%plots

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