问题
解答题
(1)3
(2)(5+2
(3)(
(4)(2
|
答案
(1)原式=9
+2
-22
=82
;2
(2)原式=(2
+5)(26
-5)=(26
)2-52=24-25=-1;6
(3)原式=(
)2-26
+1=7-26
;6
(4)原式=2
•6
+22
•6
-76
•2
-72
•2
=46
+12-14-143
=-103
-2.3
(1)3
(2)(5+2
(3)(
(4)(2
|
(1)原式=9
+2
-22
=82
;2
(2)原式=(2
+5)(26
-5)=(26
)2-52=24-25=-1;6
(3)原式=(
)2-26
+1=7-26
;6
(4)原式=2
•6
+22
•6
-76
•2
-72
•2
=46
+12-14-143
=-103
-2.3