问题
解答题
计算: (1)3
(2)(5
(3)(7
(4)
|
答案
(1)原式=
=3 2 2 3
=3
×2 3 2
×3 3
;6 2
(2)原式=
=5
-46 3 3 2
=(5
-46
)×3 2 3
×2 2 5 3
-3 2 3
;6
(3)原式=
=7
+22 6 2
-76 2
=-(7
+22
)(26
+76
) 2 (2
-76
)22
+76
)2
-61 37 28 37
;3
(4)原式=
=6 3
-26 7
=
(36
+26
) 7 (3
-26
)(37
+26
) 7
+9 13
.42 13