若 x+y=5,xy=-50 则x^2y+xy^2 =( )
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若x+y=5,xy=-50则x^2y+xy^2=()若x+y=5,xy=-50则x^2y+xy^2=()若x+y=5,xy=-50则x^2y+xy^2=()x^2y+xy^2=xy(x+y)=-50*
若 x+y=5,xy=-50 则x^2y+xy^2 =( )
若 x+y=5,xy=-50 则x^2y+xy^2 =( )
若 x+y=5,xy=-50 则x^2y+xy^2 =( )
x^2y+xy^2
=xy(x+y)
=-50*5
=-250
？ x和y应该都能求出来吧
若 x+y=5,xy=-50 则x^2y+xy^2 =( )
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