计算:(1)2a+52(a+1)-a-12(a+1)+2a-32(a+1)(2)(a2b-c2)3÷(-a3c)2(3)a2+5a+4a2+a-6•a2-6a+8a2-16(4)2x-6x-2÷(5x

题目简介

计算:(1)2a+52(a+1)-a-12(a+1)+2a-32(a+1)(2)(a2b-c2)3÷(-a3c)2(3)a2+5a+4a2+a-6•a2-6a+8a2-16(4)2x-6x-2÷(5x

题目详情

计算:
(1)
2a+5
2(a+1)
-
a-1
2(a+1)
+
2a-3
2(a+1)

(2)(
a2b
-c2
)3÷(
-a3
c
)2

(3)
a2+5a+4
a2+a-6
a2-6a+8
a2-16

(4)
2x-6
x-2
÷(
5
x-2
-x-2)
题型:解答题难度:中档来源:不详

答案

(1)原式=class="stub"2a+5-a+1+2a-3
2(a+1)
=
3(a+1)
2(a+1)
=class="stub"3
2


(2)原式=
a6b3
-c6
×
c2
a6
=-
b3
c4


(3)原式=
(a+1)(a+4)
(a-2)(a-3)
(a-2)(a-4)
(a+4)(a-4)
=class="stub"a+1
a+3


(4)原式=
2(x-3)
x-2
÷
-(x+3)(x-2)
x-2

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

=-class="stub"2
x+3

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