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6.29.8  Exact values of the complex rational roots of a polynomial: crationalroot

The crationalroot command finds complex rational roots of polynomials.


Example.
Find the rational complex roots of (x2+4)*(2x−3)=2*x3−3*x2+8*x−12:
Input:

crationalroot(2*x^3-3*x^2+8*x-12)

Output:




i,
3
2
,−2 i



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