Solve.
4. Determine if x- 3 is a factor of P(x) where P(x) = x - 3x - * +3.
5. Determine if x - 1 is a factor of P(x) where P(x) = x^5 - 4.
6. Find k so that x-2 is a factor of P(x) = x - ko? - 4x + 20
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