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I need to solve Z^3 = -8-3i, and obtain all cube roots of -8-3i showing that the sum of the cube roots is zero using matlab.

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madhan ravi
madhan ravi 2018-11-14

0 个投票

syms Z
ROOTS=solve(Z^3 == -8-3i,Z)
logical(sum(ROOTS)==0)

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James Tursa
James Tursa 2018-11-14

1 个投票

Another way is to simply use the roots( ) function with appropriate polynomial coefficients:
>> roots([1 0 0 (8+3i)])
ans =
0.8036 + 1.8798i
1.2261 - 1.6359i
-2.0297 - 0.2439i

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