化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y²)
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化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y²)化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y
化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y²)
化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y²)
化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y²)
4xy+(-2y²+3xy+x²)-(-5xy+x²+y²)=4xy-2y²+3xy+x²+5xy-x²-y²=12xy-3y²=3y(4x-y)