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