(7x+4y+xy)-6(5/6y+x-xy)
=7x+4y+xy-5y-6x+6xy
=x-y+7xy
=5+7×(-3)
=-16如图,点c是线段AB的三等分点,点D在CB伤,CD:DB=17:2 ,且CD-AC=3cm,求AB的长
若x-y=5,-xy=3,求(7x+4x+xy)-6(5/6y+x-xy)
若x-y=5,-xy=3,求(7x+4x+xy)-6(5/6y+x-xy)
数学人气:443 ℃时间:2020-04-04 12:30:51
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