(3xx-2-xx+2)×x2-4x.-数学

题目简介

(3xx-2-xx+2)×x2-4x.-数学

题目详情

(
3x
x-2
-
x
x+2
x2-4
x
题型:解答题难度:中档来源:不详

答案

(class="stub"3x
x-2
-class="stub"x
x+2
x2-4
x

=class="stub"3x
x-2
×
(x+2)(x-2)
x
-class="stub"x
x+2
×
(x+2)(x-2)
x

=3(x+2)-(x-2)
=3x+6-x+2
=2x+8.

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