问题
解答题
计算 (1)
(2)(3
(3)2x
|
答案
(1)原式=
=4xy342×2x2•x•(y3)2
;2x
(2)原式=(3
)2-(23
)2,2
=27-8,
=19;
(3)原式=2x
-22x x2
,0.62x
=2x•
-0.62 x x
,x
=4
-0.6x
,x
=17 5
.x
计算 (1)
(2)(3
(3)2x
|
(1)原式=
=4xy342×2x2•x•(y3)2
;2x
(2)原式=(3
)2-(23
)2,2
=27-8,
=19;
(3)原式=2x
-22x x2
,0.62x
=2x•
-0.62 x x
,x
=4
-0.6x
,x
=17 5
.x