化简(a-2)²-(1-b)(b+1)
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化简(a-2)²-(1-b)(b+1)
化简(a-2)²-(1-b)(b+1)
化简(a-2)²-(1-b)(b+1)
(a-2)²-(1-b)(b+1)
= (a-2)²-(1-b)(b+1)
化简(a-2)²-(1-b)(b+1)
化简(a-2)²-(1-b)(b+1)
化简(a-2)²-(1-b)(b+1)
(a-2)²-(1-b)(b+1)
= (a-2)²-(1-b)(b+1)