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How can i find complex roots?

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ssss
ssss 2014-7-9
编辑： ssss 2014-7-9
Hi all
i want to find complex roots of equation like"
19 936641 6
10 + ---- a + -------------------------------- a
1512 13778412440244368879163801600000
28771 7
- ---------------------------------- a
4039043189625920705720588697600000
36139 8
+ --------------------------------------- a
162552639514225054108626998997811200000
9
- 1/668788002572811651189779653019566080000 a
10 137 2
+ 1/376444958931811230179335208256551465779200000 a + -------- a
60540480
67 3 3851 4
+ ------------ a + ------------------- a
670442572800 2393705253600460800
44623 5
+ ------------------------- a
3876333646245309849600000
but, when i use functions of matlab this error appear: Undefined function or method 'isfinite' for input arguments of type 'sym'.
is there any one to solve this problem?
thanks for your attention.

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采纳的回答

Michael scheinfeild
roots([1 -2 3])
ans =
1.0000 + 1.4142i
1.0000 - 1.4142i
  1 个评论
ssss
ssss 2014-7-9
i used this function, but for this example it is not work.

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