问题
解答题
先化简,再求值:
|
答案
原式=
•(x-2 x-3
)x2-4-5 x-2
=
•x-2 x-3 x2-9 x-2
=
•x-2 x-3 (x+3)(x-3) x-2
=x+3
在不等式1<x≤4中,取x=4,原式值=4+3=7.
先化简,再求值:
|
原式=
•(x-2 x-3
)x2-4-5 x-2
=
•x-2 x-3 x2-9 x-2
=
•x-2 x-3 (x+3)(x-3) x-2
=x+3
在不等式1<x≤4中,取x=4,原式值=4+3=7.