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How to find the root of a polynomial

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Morne' Breitenbach
评论： Star Strider 2020-6-5
I have this polynomial: P(z) = z.^9 + z.^8 - z.^7 + z.^6 - z.^5 + z + 1
And I'd like to find the roots for it.
How would I go about doing that?

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Star Strider
Star Strider 2020-6-5
Easiest:
syms z
P(z) = z.^9 + z.^8 - z.^7 + z.^6 - z.^5 + z + 1;
rts = vpasolve(P)
Otherwise:
rts = roots([1 1 -1 1 -1 0 0 0 1 1]);
With the same essential result.

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