问题
解答题
计算: (1)(
(2)(-3x-3)-2÷x4 (3)
(4)
|
答案
(1)原式=4-
+1-1+3 4
=4;3 4
(2)原式=
x6÷x4=1 9
x2;1 9
(3)原式=
=--x2+2x+8 2(x+2)(x-2)2
;x-6 2(x-2)2
(4)原式=
+1 a+1
=a-1 a+1
.a a+1
计算: (1)(
(2)(-3x-3)-2÷x4 (3)
(4)
|
(1)原式=4-
+1-1+3 4
=4;3 4
(2)原式=
x6÷x4=1 9
x2;1 9
(3)原式=
=--x2+2x+8 2(x+2)(x-2)2
;x-6 2(x-2)2
(4)原式=
+1 a+1
=a-1 a+1
.a a+1