Solution of symbolic fourth order polynomial equation

38 views (last 30 days)
I am finding difficulty in finding roots of a fourth order polynomial equation which as as follows:
lambda^4+A*lambda^2-B*lambda+C=0
where A, B, and C are constants. I used function roots() function in matlab, but it doesnt worked.

Accepted Answer

VBBV
VBBV on 13 Nov 2021
Edited: VBBV on 13 Nov 2021
A = 2;
B = 1.4;
C = 3
C = 3
syms L
eqn = L^4 + A*L^2 - B*L + C == 0
eqn = 
sol = double(vpasolve(eqn,2))
sol =
-0.6390 + 1.3986i -0.6390 - 1.3986i 0.6390 + 0.9277i 0.6390 - 0.9277i
Try using vpasolve

More Answers (0)

Tags

Products


Release

R2021b

Community Treasure Hunt

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

Start Hunting!