2(2x²y-3xy)-(xy+4x²y)怎么化简?
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2(2x²y-3xy)-(xy+4x²y)
=4x²y-6xy-xy-4x²y
=-6xy-xy+0
=-7xy
=4x²y-6xy-xy-4x²y
=-6xy-xy+0
=-7xy
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展开全部
2(2x²y-3xy)-(xy+4x²y)
=4x²y-6xy-xy-4x²y
=(4x²y-4x²y)-(6xy+xy)
=0-7xy
=-7xy
=4x²y-6xy-xy-4x²y
=(4x²y-4x²y)-(6xy+xy)
=0-7xy
=-7xy
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