问题
解答题
(1)(3
(2)(
|
答案
原式=(15
-23
-33
)÷23 3
=10
÷23 3
=5;
(2)原式=[
+(2
-3
)][6
-(2
-3
)]6
=(
)2-(2
-3
)26
=2-(3-6
+6)2
=2-3+6
-62
=6
-7.2
(1)(3
(2)(
|
原式=(15
-23
-33
)÷23 3
=10
÷23 3
=5;
(2)原式=[
+(2
-3
)][6
-(2
-3
)]6
=(
)2-(2
-3
)26
=2-(3-6
+6)2
=2-3+6
-62
=6
-7.2