Solve the system.x2 + 4xy + 2y2 = 1x2 - 4xy - 2y2 = 1
A. {(1, 0), (-1, 0), (1, -2), (-1, 2)}
B. {(1, 1), (-1, -1), (1, -2), (-1, 2)}
C. {(1, 0), (1, 1)}
D. {(1, -2), (-1, 2)}
Answer: A
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