问题
解答题
先化简,再求值,已知a=-2
|
答案
∵a=-2
,b=2
+1,2
∴
-(a2
)2+b b2 (a-b)2
=
-( (-2
)22
)2+
+12 (
+1)22 (-2
-2
-1)22
=2
-2
-1+2 7
+92 17
=
.24
- 82 17
先化简,再求值,已知a=-2
|
∵a=-2
,b=2
+1,2
∴
-(a2
)2+b b2 (a-b)2
=
-( (-2
)22
)2+
+12 (
+1)22 (-2
-2
-1)22
=2
-2
-1+2 7
+92 17
=
.24
- 82 17