先化简,再求值xy-(4/3y+4/3)-(3/2x+xy+2),其中x=2/3,y=-3/4
问题描述:
先化简,再求值xy-(4/3y+4/3)-(3/2x+xy+2),其中x=2/3,y=-3/4
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答
xy-(4/3y+4/3)-(3/2x+xy+2)
=xy-4/3y-4/3-3/2x-xy-2
=-4/3y-3/2x-10/3
=1-1-10/3
=-10/3