Filter löschen
Filter löschen

How to find the factors of the polynomial in one than one variable

2 Ansichten (letzte 30 Tage)
yogeshwari patel
yogeshwari patel am 1 Dez. 2023
Beantwortet: Pavan Sahith am 13 Dez. 2023
syms x y
e1=x^2+4
factor(e1)
P = x^2 + y^2
QF = factor(P,x,'FactorMode','full')
factor(x^3 + 2, x, 'FactorMode', 'full')
I use the above code to find the complex factor but the answer are not correct
  3 Kommentare
yogeshwari patel
yogeshwari patel am 1 Dez. 2023
for x^2+y^2 the factors are (x+iy) and (x-iy)

Melden Sie sich an, um zu kommentieren.

Antworten (1)

Pavan Sahith
Pavan Sahith am 13 Dez. 2023
Hello Yogeswari,
As per my understanding, you want to factorize a polynomial in a complex field, and you are not able to get your expected output '(x+iy),(x-iy)' while using "factor(x^2+y^2,x,'FactorMode','full')".
When I tried with some equations like 'x^2+4',I could be able to get the linear factors.
syms x y
factor(x^2+ 4,x,"FactorMode","complex")
ans = 
factor(x^3 + 2, x, 'FactorMode', 'full')
ans = 
However, in the case of 'x^2+y^2', it appears that the answer remains irreducible. While searching the MathWorks documentation for "factor()", I found the following information:
"Factorization over complex numbers. A complex numeric factorization is a factorization into linear factors whose coefficients are floating-point numbers. Such factorization is only available if the coefficients of the input are convertible to floating-point numbers, that is, if the roots can be determined numerically. Symbolic inputs are treated as irreducible."
So,possibly 'y' might be getting considered as symbol and being treated as irreducable.
As a possible workaround, you might consider using the "solve" function:
syms x y;
e = x^2 + y^2;
roots = solve(e);
factors= prod(symvar(e,1) - roots)
factors = 
Please find the related MathWorks documentation links below
Hope that Helps.

Kategorien

Mehr zu Loops and Conditional Statements finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by