化简:(1)1x-3-6x2-9;(2)(x2-xy)÷x2-2xy+y2y•x2-y2x2y.-数学

题目简介

化简:(1)1x-3-6x2-9;(2)(x2-xy)÷x2-2xy+y2y•x2-y2x2y.-数学

题目详情

化简:
(1)
1
x-3
-
6
x2-9
;                      
(2)(x2-xy)÷
x2-2xy+y2
y
x2-y2
x2y
题型:解答题难度:中档来源:不详

答案

(1)原式=class="stub"1
x-3
-class="stub"6
(x+3)(x-3)
=class="stub"1
x+3


(2)原式=x(x-y)•class="stub"y
(x-y)2
(x+y)(x-y)
x2y
=class="stub"x+y
x

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