问题
解答题
先化简,再求值:(
|
答案
原式=
•(x+1)(x-1) (x-1)2 3 x+2
=
,3(x+1) (x-1)(x+2)
当x=1+tan60°=1+
时,原式=3
=3(1+
+1)3 (1+
-1)(1+3
+2)3
.5+ 3 2
先化简,再求值:(
|
原式=
•(x+1)(x-1) (x-1)2 3 x+2
=
,3(x+1) (x-1)(x+2)
当x=1+tan60°=1+
时,原式=3
=3(1+
+1)3 (1+
-1)(1+3
+2)3
.5+ 3 2