问题
解答题
化简求值:(
|
答案
原式=[
+x2-4 (x-2)2
]•4 (x-2)2 (x-2) x
=
•x2 (x-2)2 (x-2) x
=x x-2
当x=-
时,原式=1 2
=- 1 2 -
-21 2
.1 5
化简求值:(
|
原式=[
+x2-4 (x-2)2
]•4 (x-2)2 (x-2) x
=
•x2 (x-2)2 (x-2) x
=x x-2
当x=-
时,原式=1 2
=- 1 2 -
-21 2
.1 5