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Find a degree 3 polynomial with real coefficients having zeros x = 3 and x = 1 − 2 i and a lead coefficient of 1. Write in expanded form.

Find a degree 3 polynomial with real coefficients having zeros x = 3 and x = 1 − 2 i and a lead coefficient of 1. Write in expanded form.
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Find a degree 3 polynomial with real coefficients having zeros x = 3 and x = 1 − 2 i and a lead coefficient of 1. Write in expanded form.

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User Yin Gang
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7.2k points

1 Answer

1 vote

Explanation:

(x-3)(x-1 +2i)(x-1-2i) The imaginary roots always come in pairs : 1+- 2i

answered
User James Alvarez
by
8.1k points
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