化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y)其中x=2,y=5
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![化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y)其中x=2,y=5](/uploads/image/z/1076094-54-4.jpg?t=%E5%8C%96%E7%AE%80%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%2C%E5%B9%B6%E6%B1%82%E5%80%BC%3A3%28x-y%29%26%23178%3B-7%28x-y%29%2B8%28x-y%29%26%23178%3B%2B6%28x-y%29+%E5%85%B6%E4%B8%ADx%3D2%2Cy%E5%8C%96%E7%AE%80%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%2C%E5%B9%B6%E6%B1%82%E5%80%BC%3A3%28x-y%29%26%23178%3B-7%28x-y%29%2B8%28x-y%29%26%23178%3B%2B6%28x-y%29%E5%85%B6%E4%B8%ADx%3D2%2Cy%EF%BC%9D5)
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化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y)其中x=2,y=5
化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y
化简下列各式,并求值:
3(x-y)²-7(x-y)+8(x-y)²+6(x-y)
其中x=2,y=5
化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y)其中x=2,y=5