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Completing the square on 2x² + 4x - 4 = 0 gives which roots?
A-2 ± √3
B1 ± √3
C-1 ± √2
D-1 ± √3
Answer & Solution
Correct answer: D. -1 ± √3
Dividing by 2 gives x² + 2x = 2, so (x + 1)² = 3 and x = -1 ± √3.
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