问题
解答题
化简: ①
②-
③
④
|
答案
①
=(-144)×(-169)
=12×13=156;144×169
②-1 3
=-225
×15=-5;1 3
③
=3|m|18m2n
;2n
④2 3
×(-93 3 4
),45
=
×(-9)×2 3
,
×4515 4
=(-6)×
,15 3 2
=-45
.3
化简: ①
②-
③
④
|
①
=(-144)×(-169)
=12×13=156;144×169
②-1 3
=-225
×15=-5;1 3
③
=3|m|18m2n
;2n
④2 3
×(-93 3 4
),45
=
×(-9)×2 3
,
×4515 4
=(-6)×
,15 3 2
=-45
.3