若x-y=5,-xy=3,求(7x+4y+xy)-6(5\6+x-xy)的值

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若x-y=5,-xy=3,求(7x+4y+xy)-6(5\6+x-xy)的值若x-y=5,-xy=3,求(7x+4y+xy)-6(5\6+x-xy)的值若x-y=5,-xy=3,求(7x+4y+xy)

若x-y=5,-xy=3,求(7x+4y+xy)-6(5\6+x-xy)的值
若x-y=5,-xy=3,求(7x+4y+xy)-6(5\6+x-xy)的值

若x-y=5,-xy=3,求(7x+4y+xy)-6(5\6+x-xy)的值
xy=-3
原式=7x+4y+xy-5y-6x+6xy
=x-y+7xy
=5-21
=-16

（-117-5根号13）/2或（-117-3根号13）/2
sb了我又要被老师骂了

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