计算.(1)2x-6x2-4x+4÷(x+3)•x2+6x+93-x;(2)2a+1-a-2a2-1÷a2-2aa2-2a+1.-数学

题目简介

计算.(1)2x-6x2-4x+4÷(x+3)•x2+6x+93-x;(2)2a+1-a-2a2-1÷a2-2aa2-2a+1.-数学

题目详情

计算.
(1)
2x-6
x2-4x+4
÷(x+3)•
x2+6x+9
3-x

(2)
2
a+1
-
a-2
a2-1
÷
a2-2a
a2-2a+1
题型:解答题难度:中档来源:不详

答案

(1)原式=
2(x-3)
(x-2)2
class="stub"1
x+3
(x+3)2
3-x

=-
2(x+3)
(x-2)2


(2)原式=class="stub"2
a+1
-class="stub"a-2
(a-1)(a+1)
(a-1)2
a(a-2)

=class="stub"2
a+1
-class="stub"a-1
a+1

=class="stub"3-a
a+1

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