-3xy²乘2x/15y?
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-3xy²×2x/15y
=-3xy×2x/15 (约分,去掉y)
=-xy×2x/5 (约分,去掉3)
=-2x²y/5
=-3xy×2x/15 (约分,去掉y)
=-xy×2x/5 (约分,去掉3)
=-2x²y/5
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-3xy²乘2x/15y
=-3xy^2. (2x/(15y))
=-xy^2. (2x/(5y))
=-xy. (2x/5)
=-(2/5)x^2.y
=-3xy^2. (2x/(15y))
=-xy^2. (2x/(5y))
=-xy. (2x/5)
=-(2/5)x^2.y
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