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4. One of the roots of the polynomial P(z) = z+4z3 +3z + 10z + 50 is i -3. (a) Find a quadratic factor

4. One of the roots of the polynomial P(z) = z+4z3 +3z + 10z + 50 is i -3. (a) Find a quadratic factor of P(z) with real coefficients. (b) Find the other root of P(z).

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