因式分解 (2 11:56:47)(a-2b)²-a+2b
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因式分解 (2 11:56:47)(a-2b)²-a+2b
因式分解 (2 11:56:47)
(a-2b)²-a+2b
因式分解 (2 11:56:47)(a-2b)²-a+2b
(a-2b)²-a+2b
=(a-2b)^2-(a-2b)
=(a-2b)(a-2b-1)
=(a-2b)(a-2b-1)
=(a-2b)²-(a-2b)=(a-2b)(a-2b-1)
这叫因式分解不?时间太长忘了
(a-2b)²-a+2b
=(a-2b)²-(a-2b)
=(a-2b)(a-2b-1)
(a-2b)²-a+2b=(a-2b)²-(a-2b)=(a-2b)(a-2b-1)
(a-2b)²-a+2b
=(a-2b)²-(a-2b)
=(a-2b)(a-2b-1)
(a-2b)²-a+2b
=(a-2b)²-(a-2b)
=(a-2b)(a-2b-1)
就是这样