Does anybody ou know a Matlab or a Mathcad algorithm for solving x^4 - 4.28x^3 + 5.94x^2 + 0.029x + 7.62 = 0
Even an online inaccurate solver would be great.
Thank you!
2007-05-26 23:51:33 · 2 answers · asked by Λиδѓεy™ 6 in Science & Mathematics ➔ Mathematics
I'm afraid I don't know how to do this in matlab or mathcad -- you'll have to look at the instruction manuals for the respective programs. I do know that maxima can solve these equations (you can download it for free from http://maxima.sourceforge.net ) -- the command solve (x^4 - 4.28*x^3 + 5.94*x^2 + 0.029*x + 7.62 = 0, x); returns an exact symbolic solution (which is extremely ugly if the equation has no rational roots, as in this case), and allroots (x^4 - 4.28*x^3 + 5.94*x^2 + 0.029*x + 7.62 = 0); returns the following numerical solution: [x = 0.93526261999789 %i - 0.29969957236149,
x = - 0.93526261999789 %i - 0.29969957236149,
x = 1.395721200200523 %i + 2.439699572361491,
x = 2.439699572361491 - 1.395721200200523 %i]
If you don't want to download that, there is the following online tool (http://www.savetman.com/roots.html ), which appeared as the first item on a google search for "polynomial root finder".
2007-05-27 07:05:24 · answer #1 · answered by Pascal 7 · 0⤊ 0⤋
Times everything by 100 or 1000 to make it easier first. Then factorise it, and after that each of the factors might be 0. therefore there will be four possible answers.
2007-05-27 00:04:43 · answer #2 · answered by gaga 2 · 0⤊ 0⤋