Finding coefficients of a polynomial from roots
3 views (last 30 days)
Show older comments
I have roots of a third order system. Now i need a function to get co-efficients of the polynomial for those roots. Thanks in advance
0 Comments
Answers (1)
Roger Stafford
on 18 Feb 2015
If r1, r2, and r3 are the roots, then a polynomial with those roots is:
p(x) = (x-r1)*(x-r2)*(x-r3) = x^3-(r1+r2+r3)*x^2+(r2*r3+r3*r1+r1*r2)*x-r1*r2*r3
0 Comments
See Also
Categories
Find more on Polynomials in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!