作业帮先化简,再求值3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y先化简,再求值：3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y,其中x,y满足（x+2）²+丨y-1丨＝0
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![先化简,再求值3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y先化简,再求值：3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y,其中x,y满足（x+2）²+丨y-1丨＝0](/uploads/image/z/695971-19-1.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC3x%26%23178%3By-%5B2xy%26%23178%3B-2%28xy-3%2F2x%26%23178%3By%29%2B2xy%5D-2x%26%23178%3By%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9A3x%26%23178%3By-%5B2xy%26%23178%3B-2%28xy-3%2F2x%26%23178%3By%29%2B2xy%5D-2x%26%23178%3By%2C%E5%85%B6%E4%B8%ADx%2Cy%E6%BB%A1%E8%B6%B3%EF%BC%88x%2B2%EF%BC%89%26%23178%3B%2B%E4%B8%A8y-1%E4%B8%A8%EF%BC%9D0)
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先化简,再求值3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y先化简,再求值：3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y,其中x,y满足（x+2）²+丨y-1丨＝0
先化简,再求值3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y
先化简,再求值：3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y,其中x,y满足（x+2）²+丨y-1丨＝0
先化简,再求值3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y先化简,再求值：3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y,其中x,y满足（x+2）²+丨y-1丨＝0
x,y满足（x+2）²+丨y-1丨＝0,则x+2=0,x=-2；y-1=0,y=1
3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y=3x²y-（2xy²-2xy+3x²y+2xy）-2x²y
=3x²y-2xy²-3x²y-2x²y=-2xy²-2x²y=-2xy（y-x）
将x=-2,y=1代入得-2xy（y-x）=-2X（-2）（1+2）=12