问题
解答题
计算: (1)
(2)(
(3)
(4)
|
答案
(1)原式=
•(x-1)2 (x+1)(x-1)
=x;x(x+1) x-1
(2)原式=
•a6b3 -c3
•c4 a2b2
=-a4 b4c4
;a8 b3c3
(3)原式=
•a+2 a-2
=1 a(a+2)
;1 a(a-2)
(4)原式=-
•(a+4)(a-4) (a+4)2
=-2.2(a+4) a-4
计算: (1)
(2)(
(3)
(4)
|
(1)原式=
•(x-1)2 (x+1)(x-1)
=x;x(x+1) x-1
(2)原式=
•a6b3 -c3
•c4 a2b2
=-a4 b4c4
;a8 b3c3
(3)原式=
•a+2 a-2
=1 a(a+2)
;1 a(a-2)
(4)原式=-
•(a+4)(a-4) (a+4)2
=-2.2(a+4) a-4