Bài 3 - Đề Thi HKI lớp 9 Đồng Đen By Trang Anh Nam December 18, 2013 .(a-b)..(a-b).=(a-b)2=(a-b)2=(a-b)(a+b-a+b)=(a-b)2b=2b(a-b) Share Get link Facebook X Pinterest Email Other Apps Share Get link Facebook X Pinterest Email Other Apps Comments
.(a-b)
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.(a-b).
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