Solve the quadratic equation by completing the square.x2 - 4x - 7 = 0
A. {2 - 
, 2 + 
}
B. {-2 - 
, -2 + 
}
C. {2 - 
, 2 + 
}
D. {4 - 
, 4 + 
}
Answer: C
Mathematics
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