Solve.x2 + y2 - 2xy = 36x2 + y2 + 2xy = 144
A. (18, -6),(-18, -6), (-6, 18), (6, 18)
B. (9, 3), (3, 9)
C. (9, -3), (-9, -3), (-3, 9), (3, 9)
D. (-3, 9), (-3, -9)
Answer: B
Mathematics
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