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歡迎您訪問數學考題練習:若x2-2px+q=(x+)2-,則p=___!

數學考題練習:若x2-2px+q=(x+)2-,則p=___

更新時間:2024-01-12 16:24:45作者:貝語網校

若x2-2px+q=(x+)2-,則p=________,q=________.

試題答案

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試題解析

此題考查了配方法,解題時要注意常數項的求得,若二次項系數為1,則常數項是一次項系數的一半的平方,若二次項系數不為1,則可提取二次項系數,將其化為1.

解答:∵x2-2px+q=x2-2px+p2-p2+q=(x-p)2+q-p2=(x+)2-

∴p=-,q-p2=-

∴p=-,q=-.

點評:此題考查了學生學以致用的能力,解題時要注意常數項的求解方法.

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