x²—(y—z)²1.________________(x+y)²—z²a b c2.已知abc=1,求________ +________+________的值.ab+a+1 bc+b+1 ac+c+14xy 4xy3.化简分式(x—y+_______)(x+y—_______)的结果是x—y x+y1 1 1 14.计算:_______+__
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![x²—(y—z)²1.________________(x+y)²—z²a b c2.已知abc=1,求________ +________+________的值.ab+a+1 bc+b+1 ac+c+14xy 4xy3.化简分式(x—y+_______)(x+y—_______)的结果是x—y x+y1 1 1 14.计算:_______+__](/uploads/image/z/4494742-70-2.jpg?t=x%26%23178%3B%E2%80%94%EF%BC%88y%E2%80%94z%EF%BC%89%26%23178%3B1.________________%28x%2By%29%26%23178%3B%E2%80%94z%26%23178%3Ba+b+c2.%E5%B7%B2%E7%9F%A5abc%3D1%2C%E6%B1%82________+%2B________%2B________%E7%9A%84%E5%80%BC.ab%2Ba%2B1+bc%2Bb%2B1+ac%2Bc%2B14xy+4xy3.%E5%8C%96%E7%AE%80%E5%88%86%E5%BC%8F%EF%BC%88x%E2%80%94y%2B_______%EF%BC%89%EF%BC%88x%2By%E2%80%94_______%EF%BC%89%E7%9A%84%E7%BB%93%E6%9E%9C%E6%98%AFx%E2%80%94y+x%2By1+1+1+14.%E8%AE%A1%E7%AE%97%EF%BC%9A_______%2B__)
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