计算:[4(a-2)2+12(a+2)(a-2)-8(a-1)2(a-2)]÷4(a-2)=______.-数学

题目简介

计算:[4(a-2)2+12(a+2)(a-2)-8(a-1)2(a-2)]÷4(a-2)=______.-数学

题目详情

计算:[4(a-2)2+12(a+2)(a-2)-8(a-1)2(a-2)]÷4(a-2)=______.
题型:填空题难度:中档来源:不详

答案

[4(a-2)2+12(a+2)(a-2)-8(a-1)2(a-2)]÷4(a-2),
=[4(a-2)2+12(a+2)(a-2)-8(a-1)2(a-2)]÷4(a-2),
=4(a-2)[(a-2)+3(a+2)-2(a-1)2]÷4(a-2),
=(a-2)+3(a+2)-2(a-1)2,
=a-2+3a+6-2+4a-2a2,
=-2a2+8a+2.

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