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因式分解:2x²+4x+1,
人气:296 ℃ 时间:2020-04-12 22:44:09
解答
2x²+4x+1
= 2x²+4x+2-1
= 2(x²+2x+1)-1
= 2(x+1)²-1
= 2(x+1+√2/2)(x+1-√2/2)
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