问题
解答题
化简题: (1)化简
(2)化简
|
答案
(1)原式=4(x-2)+3(x+2)-2 (x+2)(x-2)
=
;7x-4 x2-4
(2)原式=
+1 x 1 y 1- 1 xy
=x+y xy xy-1 xy
=
.x+y xy-1
故答案为
、7x-4 x2-4
.x+y xy-1
化简题: (1)化简
(2)化简
|
(1)原式=4(x-2)+3(x+2)-2 (x+2)(x-2)
=
;7x-4 x2-4
(2)原式=
+1 x 1 y 1- 1 xy
=x+y xy xy-1 xy
=
.x+y xy-1
故答案为
、7x-4 x2-4
.x+y xy-1