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Algebra
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If –3 + i is a root of the polynomial function f(x), which of the following must also be a root of f(x)?

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Related questions

If a polynomial function f(x) has roots 3 and the square root of 7 what must also be a root of f(x)?
 
A. negative square root of 7
B. i square root of seven
C. –3
D. 3i

if   is a polynomial root, name another root of the polynomial, and explain how you know it must also be a polynomial be a root.

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