问题
解答题
(1)求式子中x的值:x2=
(2)计算
(3)化简:|
|
答案
(1)x=±
=±4 81
;2 9
(2)原式=2+3-2=3;
(3)原式=
-(2
-1)+3 3
=
-2
+1+3 3
=
+1.2
(1)求式子中x的值:x2=
(2)计算
(3)化简:|
|
(1)x=±
=±4 81
;2 9
(2)原式=2+3-2=3;
(3)原式=
-(2
-1)+3 3
=
-2
+1+3 3
=
+1.2