计算：（1-x/3-x）²÷（x²-6x+9/9-x²）²•1/（x²-2x+1）要有过程解答.

计算：（1-x/3-x）²÷（x²-6x+9/9-x²）²•1/（x²-2x+1）要有过程解答.
计算：（1-x/3-x）²÷（x²-6x+9/9-x²）²•1/（x²-2x+1）
要有过程解答.

计算：（1-x/3-x）²÷（x²-6x+9/9-x²）²•1/（x²-2x+1）要有过程解答.
原式=[(x-1)²/(x-3)²]×[-(x+3)(x-3)/(x-3)²]×1/(x-1)²
=-(x-1)²(x+3)(x-3)/[(x-3)²(x-3)²(x-1)²]
=-1/(x+3)(x-3)
=-1/(x²-9)