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I need help answering these questions f1. A cube equation with real coefficients has roots -1 and v3 +2i, what is the third root? 2.

I need help answering these questions

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\f1. A cube equation with real coefficients has roots -1 and v3 +2i, what is the third root? 2. A equation with integral coefficients has roots -3+ v2 and -2i, What are the other roots? Find x 3. x4 -4x2 -12 =0 4. x +6x' -4x -24=0

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