# SOLUTION: Id have a question; I should find out what the possible rational roots of x^3 - 4x^2 + 2x + 1 are, I am not sure if 3.303, -0.303, 1 are right and I totally dont understand ho

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Question 205169: Id have a question; I should find out what the possible rational roots of x^3 - 4x^2 + 2x + 1 are, I am not sure if 3.303, -0.303, 1 are right and
I totally dont understand how to use synthetic substitution, to find out which of the possible rational roots are actually a root of the equation. Could someone please help me with this?