问题
填空题
若x>0,则(2x
|
答案
原式=(2x
)2-(31 4
)2-4x-3 2
•x+4x-1 2
•x1 2 1 2
=4x
-33-4x-1 2
+1+4x-1 2
+1 2 1 2
=4x
-27-4x1 2
+4x01 2
=-27+4
=-23.
故答案为-23.
若x>0,则(2x
|
原式=(2x
)2-(31 4
)2-4x-3 2
•x+4x-1 2
•x1 2 1 2
=4x
-33-4x-1 2
+1+4x-1 2
+1 2 1 2
=4x
-27-4x1 2
+4x01 2
=-27+4
=-23.
故答案为-23.