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

crationalroot takes 1 or 3 arguments : a polynomial and optionnally two complex numbers $ \alpha$,$ \beta$. To 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 :
[2*i,3/2,-2*i]



giac documentation written by Renée De Graeve and Bernard Parisse