a(a+b)(a-b)-a(a+b)(a+b)
=a(a+b)[a-b-(a+b)]
=a(a+b)(a-b-a-b)
=-2ab(a+b).
因式分解：a(a+b)(a-b)-a(a+b)的二次方
因式分解：a(a+b)(a-b)-a(a+b)的二次方
数学人气：515 ℃时间：2019-12-06 20:43:21
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