问题
解答题
计算: (1)(
(2)化简:
|
答案
(1)原式=3-1+3
-4-2 2
=-2+2
;2
(2)
-x2 x-2
+4x x-2 4 x-2
=x2-4x+4 x-2
=(x-2)2 x-2
=x-2.
计算: (1)(
(2)化简:
|
(1)原式=3-1+3
-4-2 2
=-2+2
;2
(2)
-x2 x-2
+4x x-2 4 x-2
=x2-4x+4 x-2
=(x-2)2 x-2
=x-2.