Add the following:
(ii) 3x²y2 - 4xy +4,6+8xy - 4x^2y^2
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Answer:
=(3x²y²-4xy+4)+(6+8xy-4x²y²)
=3x²y²-4xy+4+6+8xy-4x²y²
=-x²y²+4xy+10
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