xy=6,x-y=5,x^2y+xy^2
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xy=6,x-y=5,x^2y+xy^2xy=6,x-y=5,x^2y+xy^2xy=6,x-y=5,x^2y+xy^2(x+y)"=(x-y)"+4xy=25+24=49x+y=±7x"y+xy"=
xy=6,x-y=5,x^2y+xy^2
xy=6,x-y=5,x^2y+xy^2
xy=6,x-y=5,x^2y+xy^2
(x+y)" = (x-y)"+4xy = 25 + 24 =49
x+y = ±7
x"y+xy" = xy(x+y) = ±42
根据(x+y)^2=(x-y)^2+4xy=25+24=49
有：x+y=+/-7
x^2y+xy^2=xy(x+y)=6*(+/-7)=+/-42
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