已知x十y十2=2xy,则4x一5xy十4y十8=()xy

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已知x十y十2=2xy,则4x一5xy十4y十8=()xy

已知x十y十2=2xy,则4x一5xy十4y十8=()xy
已知x十y十2=2xy,则4x一5xy十4y十8=()xy

已知x十y十2=2xy,则4x一5xy十4y十8=()xy
x+y+2=2xy,可得x+y=2xy-2
4x一5xy十4y十8
=4(x+y)-5xy+8
=8xy-8-5xy+8
=3xy>xy