Solve the Quadratic Equation by Completing the Square and Applying $$3 x ^ { 2 } - 12 x + 21 = 0$$

question 96

Multiple Choice

Solve the quadratic equation by completing the square and applying the square root property. $$3 x ^ { 2 } - 12 x + 21 = 0$$

• A) \(\{ 2 + \sqrt { 3 } , 2 - \sqrt { 3 } \}\)
• B) \(\{ 2 + i \sqrt { 3 } , 2 - i \sqrt { 3 } \}\)
• C) \(\left\{ \frac { 3 } { 2 } , - \frac { 3 } { 2 } \right\}\)
• D) \(\{ - 2 + i \sqrt { 5 } , - 2 - i \sqrt { 5 } \}\)

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