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Finding the roots in complex equations.

Find all the zeros (both real and complex) of

f(x)= x^5 - 3x^4 + 12x^3 - 28x^2 + 27x -9

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I hope you are familiar with division algorithm.
So first thing I did was plug in x=1. The sum of the coefficients is zero so f(1)=0 ...

Solution Summary

The roots in complex equation are calculated.