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先化简求值:-2y3+(3xy2-x2y)-2(xy2-y3),其中x=1,y=-1
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教案备课库《第三章整式加减单元测试(三)》真题及答案
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先化简再求值.3x2y-[2xy2-2xy-x2y+xy]+3xy2其中x=3y=-;
先化简再求值2x2y+xy2﹣3x2y﹣x﹣2xy2﹣2x其中x=﹣2y=﹣3.
先化简再求值.x+2yx﹣2y+9x3y﹣12xy3+3xy2÷﹣3xy其中x=1y=﹣2.
先化简再求值x2y+5xy﹣32x2y+xy其中x=﹣y=4.
先化简再求值.4xy﹣[x2+5xy﹣y2﹣2x2+3xy﹣y2]其中x=﹣1y=2.
先化简再求值3x2y-[2xy2-2xy-x2y+xy]+3xy2其中x=3y=-.
先化简再求值2x2+-x2+3xy+2y2-x2-xy+2y2其中x=y=3
先化简再求值已知2﹣3xy+x2﹣[2x2﹣35xy﹣2x2﹣xy]其中xy满足|x+2|+y﹣32
先化简再求值求多项式2x2﹣3xy﹣3y2﹣2xy的值其中x=2y=﹣1.
先化简后求值2x2y+xy2﹣2x2y﹣3x﹣2xy2﹣2y的值其中x=﹣1y=2.
先化简再求值3x2y-[2xy2-2xy-x2y+xy]+3xy2其中x=3y=-.
先化简再求值32x2y-xy2-4-xy2+2x2y其中x=-2y=3.
先化简再求值:x2+-x2+3xy+2y2-x2-xy+2y2其中x=1y=3.
先化简再求值2xy2+3y3-x2y--2x2y+y3+xy2-4y3其中x=2y=-3.
先化简再求值5x+13y﹣4xy﹣26x+5y﹣2xy其中x=﹣3y=﹣1.
先化简再求值3x2y-2xy2-xy2-2x2y其中x=-1y=2.
先化简再求值8xy﹣x2+y2﹣4x2﹣y2+2xy﹣3其中x=1y=﹣1.
先化简再求值.4xy﹣[x2+5xy﹣y2﹣2x2+3xy﹣y2]其中x=﹣1y=2.
先化简再求值3xy﹣[2x2+4xy﹣2y2﹣3x2+2xy﹣4y2]其中x=3y=﹣.
先化简再求值已知﹣2y3+3xy2﹣x2y﹣2xy2﹣y3其中x=1y=﹣2.
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