Determine the Most Efficient Method to Use When Solving a Quadratic

question 93

Multiple Choice

Determine the Most Efficient Method to Use When Solving a Quadratic Equation
Solve the equation by the method of your choice.
- $x ^ { 2 } + 12 x + 15 = 0$

• A) \(\{ - 6 - \sqrt { 21 } , - 6 + \sqrt { 21 } \}\)
• B) \(\{ 6 + \sqrt { 21 } \}\)
• C) \(\{ 6 - \sqrt { 15 } , 6 + \sqrt { 15 } \}\)
• D) \(\{ - 12 + \sqrt { 15 } \}\)

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