问题
解答题
①a+2-
②
③(1-
④(
|
答案
①原式=
+(a+2)(a-2) a-2 4 a-2
=
;a2 a-2
②原式=12-2(m+3) (m+3)(m-3)
=-2(m-3) (m+3)(m-3)
=-
;2 m+3
③原式=
•1-x-1 1-x x-1 x
=1;
④原式=0.
①a+2-
②
③(1-
④(
|
①原式=
+(a+2)(a-2) a-2 4 a-2
=
;a2 a-2
②原式=12-2(m+3) (m+3)(m-3)
=-2(m-3) (m+3)(m-3)
=-
;2 m+3
③原式=
•1-x-1 1-x x-1 x
=1;
④原式=0.