Substract x²- 2xy+ 5xy - 4 from 4xy- 5x²- y² + 6
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Answer:
-6x^2-y^2+xy+10 is the answer
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Answer : (x²- 2xy+ 5xy - 4)-(4xy- 5x²- y²+ 6 )
x²- 2xy+ 5xy - 4 -4xy + 5x²+ y²-6
6x²-xy + y² -10
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