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数学
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当x=2+根号3时,x的平方-4x+2010=?
人气:245 ℃ 时间:2020-04-04 06:44:14
解答
∵x²-4x+2010
=(x²-4x+4)+2006
=(x-2)²+2006
=(2+√3-2)²+2006
=(√3)²+2006
=3+2006
=2009
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