问题
解答题
(1)
(2)
(3)
(4)(
|
答案
(1)原式=2×3-2=6-2=4;
(2)原式=
=
+22 2 2
=3;3 2 2
(3)原式=
-2
+5 5 3 5
=
×61 3
-3 5 3 5
=1-2
;2
(4)原式=(
)2-(7
)2-4=7-3-4=0.3
(1)
(2)
(3)
(4)(
|
(1)原式=2×3-2=6-2=4;
(2)原式=
=
+22 2 2
=3;3 2 2
(3)原式=
-2
+5 5 3 5
=
×61 3
-3 5 3 5
=1-2
;2
(4)原式=(
)2-(7
)2-4=7-3-4=0.3