问题
解答题
计算 (1)4
(2)
(3)(
(4)
(5)
|
答案
(1)原式=4
+35
-25
+42 2
=8
+25
;2
(2)原式=
×5 3
×3 7 7 5
=1;
(3)原式=(
-6
)(22 2
+6
)2 6 3
=(
-6
)×2 2 8 6 3
=16-32 3
=
;16 3
(4)原式=-2b
•ab 3a ab 2 ab 3b
=-3a2b
;ab
(5)原式=4
-3
+(3-3 6 2
)(1+3
)3 3
=4
-3
+3-3 6 2
+3
-13
=4
-3
+2.3 6 2