计算:(1)(12)-2+33+20110;(2)(1x3-1x2+1x)•x3;(3)(x+y)2xy-(x-y)2xy.-数学

题目简介

计算:(1)(12)-2+33+20110;(2)(1x3-1x2+1x)•x3;(3)(x+y)2xy-(x-y)2xy.-数学

题目详情

计算:
(1)(
1
2
)-2+33+20110

(2)(
1
x3
-
1
x2
+
1
x
)•x3

(3)
(x+y)2
xy
-
(x-y)2
xy
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"1
2
)-2+33+20110

=4+27+1
=32;
(2)(class="stub"1
x3
-class="stub"1
x2
+class="stub"1
x
)•x3

=1-x+x2;
(3)
(x+y)2
xy
-
(x-y)2
xy

=
(x+y)2-(x-y)2
xy

=class="stub"4xy
xy

=4.

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