问题
解答题
(1)计算:(-1)2+sin230°+(
(2)化简:
|
答案
(1)原式=1+
+1-2=1 4
;1 4
(2)原式=
÷3(x-2) (x+2)(x-2) x+2 (x+2)2
=
•(x+2)=3.3 x+2
(1)计算:(-1)2+sin230°+(
(2)化简:
|
(1)原式=1+
+1-2=1 4
;1 4
(2)原式=
÷3(x-2) (x+2)(x-2) x+2 (x+2)2
=
•(x+2)=3.3 x+2