在化简2[2分之3x²y-2分之1(x+2)]-3(x²y-2y)-6(y+3分之2),求值时,小明将x=2,y=1错抄成x=2,y=-1,可结果还是正确的,写出你的演算过程,
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![在化简2[2分之3x²y-2分之1(x+2)]-3(x²y-2y)-6(y+3分之2),求值时,小明将x=2,y=1错抄成x=2,y=-1,可结果还是正确的,写出你的演算过程,](/uploads/image/z/2342528-8-8.jpg?t=%E5%9C%A8%E5%8C%96%E7%AE%802%5B2%E5%88%86%E4%B9%8B3x%26%23178%3By-2%E5%88%86%E4%B9%8B1%28x%2B2%29%5D-3%28x%26%23178%3By-2y%EF%BC%89-6%28y%2B3%E5%88%86%E4%B9%8B2%EF%BC%89%2C%E6%B1%82%E5%80%BC%E6%97%B6%2C%E5%B0%8F%E6%98%8E%E5%B0%86x%3D2%2Cy%3D1%E9%94%99%E6%8A%84%E6%88%90x%3D2%2Cy%3D-1%2C%E5%8F%AF%E7%BB%93%E6%9E%9C%E8%BF%98%E6%98%AF%E6%AD%A3%E7%A1%AE%E7%9A%84%2C%E5%86%99%E5%87%BA%E4%BD%A0%E7%9A%84%E6%BC%94%E7%AE%97%E8%BF%87%E7%A8%8B%2C)
在化简2[2分之3x²y-2分之1(x+2)]-3(x²y-2y)-6(y+3分之2),求值时,小明将x=2,y=1错抄成x=2,y=-1,可结果还是正确的,写出你的演算过程,
在化简2[2分之3x²y-2分之1(x+2)]-3(x²y-2y)-6(y+3分之2),求值时,小明将x=2,y=1错抄成x=2,y=-1,可结果还是正确的,写出你的演算过程,
在化简2[2分之3x²y-2分之1(x+2)]-3(x²y-2y)-6(y+3分之2),求值时,小明将x=2,y=1错抄成x=2,y=-1,可结果还是正确的,写出你的演算过程,
2[2分之3x²y-2分之1(x+2)]-3(x²y-2y)-6(y+3分之2)
=3x²y-x-2-3x²y+6y-6y-4
=-x-6
化简的结果不含y,所以,与y的取值无关,所以小明抄错了结果还是正确的