问题
解答题
计算: (1)(3
(2)
(3)
(4)(
|
答案
(1)原式=
=(3
+45
)(72
+26
) 3 (7
-26
)(73
+26
) 3
;21
+630
+5615
+83 6 282
(2)原式=
-5(4+
)11 42-(
)211
-4(
+11
) 7 (
)2-(11
)27
=4+2(3-
)7 32-(
)27
-(11
+11
)-(3-7
)=1;7
(3)原式=
-3 2
-2 3
+
(2+3
) 3
+23
=-3 2
-3 2
;3
(4)原式=(
-
+3 2 (
+3
)(2
-3
) 2
+2(
+1)3 (
-1)(3
+1) 3
)×(1-
-12 (
+1)(2
-1) 2
),2
=(2
-2)(1-2
),2
=4
-6.2