问题
解答题
化简: (1)(
(2)(
|
答案
(1)原式=
•a2 b2
•25b2 4a4 a 5b
=
;5 4ab
(2)原式=[
-x+2 x(x-2)
]•x-1 (x-2)2 x x-4
=[
-(x+2)(x-2) x(x-2)2
]•x(x-1) x(x-2)2 x x-4
=
•x-4 x(x-2)2 x x-4
=
.1 x2-4x+4
化简: (1)(
(2)(
|
(1)原式=
•a2 b2
•25b2 4a4 a 5b
=
;5 4ab
(2)原式=[
-x+2 x(x-2)
]•x-1 (x-2)2 x x-4
=[
-(x+2)(x-2) x(x-2)2
]•x(x-1) x(x-2)2 x x-4
=
•x-4 x(x-2)2 x x-4
=
.1 x2-4x+4