Solve the Polynomial Equation in the Complex Numbers $$3 x ^ { 3 } - x ^ { 2 } - 21 x + 7 = 0$$

question 111

Multiple Choice

Solve the polynomial equation in the complex numbers.
- $$3 x ^ { 3 } - x ^ { 2 } - 21 x + 7 = 0$$

• A) \(\{ 3 , \sqrt { 7 } , - \sqrt { 7 } \}\)
• B) \(\left\{ \frac { 1 } { 2 } , \sqrt { 7 } , - \sqrt { 7 } \right\}\)
• C) \(\left\{ - \frac { 1 } { 2 } , \sqrt { 7 } , - \sqrt { 7 } \right\}\)
• D) \(\{ - 3 , \sqrt { 7 } , - \sqrt { 7 } \}\)

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