1.
Simplify : (x - y + 2xy + 1) - (x2 + y2 + 4xy – 5).
(A) -2y2 - 2xy + 6 (B) 2y2 + 2xy + 6 (C) 2xy? - 2xy + 6 (D) -2y2 - 2xy - 6
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ok wait et me solve............
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