问题
解答题
先化简:
|
答案
÷(x+2-3-x x-2
)5 x-2
=
÷[3-x x-2
-(x+2)(x-2) x-2
]5 x-2
=-
÷x-3 x-2 x2-9 x-2
=-
•x-3 x-2 x-2 (x+3)(x-3)
=-
,1 x+3
当x=
-3时,原式=-3
=-1
-3+33
.3 3
(x的值只要为无理数即可)
先化简:
|
÷(x+2-3-x x-2
)5 x-2
=
÷[3-x x-2
-(x+2)(x-2) x-2
]5 x-2
=-
÷x-3 x-2 x2-9 x-2
=-
•x-3 x-2 x-2 (x+3)(x-3)
=-
,1 x+3
当x=
-3时,原式=-3
=-1
-3+33
.3 3
(x的值只要为无理数即可)