下列由左到右变形,属于因式分解的是([]A.(2x+3)(2x-3)=4x2-9>0B.4x2+18x-1=4x(x+2)-1C.(x-2y)2=x2-4xy+4y2D.(a-b)2-9=(a-
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题目简介
下列由左到右变形,属于因式分解的是([]A.(2x+3)(2x-3)=4x2-9>0B.4x2+18x-1=4x(x+2)-1C.(x-2y)2=x2-4xy+4y2D.(a-b)2-9=(a-
题目详情
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B.4x2+18x-1=4x(x+2)-1
C.(x-2y)2=x2-4xy+4y2
D.(a-b)2-9=(a-b+3)(a-b-3)
答案