(x-1)²化简

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(x-1)²化简(x-1)²化简(x-1)²化简(x-1)²=x²-2×x×1+1²=x²-2x+1x²+1-2x

(x-1)²化简
(x-1)²化简

(x-1)²化简
(x-1)²
=x²-2×x×1+1²
=x²-2x+1

x²+1-2x