问题
解答题
化简: (1)
(2)
(3)
(4)
(5)
|
答案
(1)
=25×169
×25
=5×13=65;169
(2)
=|a|•3a2
=±3
a;3
(3)
=12
×4
=23
;3
(4)
=|3y|9xy3
=±3yxy
;xy
(5)
=32a2b
=|4a|16a2•2b
=±4a2b
.2b
化简: (1)
(2)
(3)
(4)
(5)
|
(1)
=25×169
×25
=5×13=65;169
(2)
=|a|•3a2
=±3
a;3
(3)
=12
×4
=23
;3
(4)
=|3y|9xy3
=±3yxy
;xy
(5)
=32a2b
=|4a|16a2•2b
=±4a2b
.2b