化简:(x2-4)(x+2x2-2x-x-1x2-4x+4)÷x-4x=______.-数学

题目简介

化简:(x2-4)(x+2x2-2x-x-1x2-4x+4)÷x-4x=______.-数学

题目详情

化简:(x2-4)(
x+2
x2-2x
-
x-1
x2-4x+4
x-4
x
=______.
题型:填空题难度:中档来源:不详

答案

(x2-4)(class="stub"x+2
x2-2x
-class="stub"x-1
x2-4x+4
)÷class="stub"x-4
x
=
(x+2)(x-2)[class="stub"x+2
x(x-2)
-class="stub"x-1
(x-2)2
]•class="stub"x
x-4

=(x+2)(x-2)
x2-4-x2+x
x(x-2)2
•class="stub"x
x-4

=class="stub"x+2
x-2

故答案为class="stub"x+2
x-2

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