1.化簡a-3b/a-2,以正指數表示答案。
(請做埋式)
2.化簡(xy2)-3/y-2,以正指數表示答案。
(請做埋式)
數學問題~~~~
2007-12-11 6:45 pm
回答 (3)
2007-12-11 6:58 pm
✔ 最佳答案
1. a - 3b / a - 2 ( 已經係answer )2. ( xy2 ) - 3 / y - 2
= 2xy - 3/y -2
參考: ME
2007-12-11 9:23 pm
1. a-3b/a-2
=1-3b/-2
解釋：因為所有數自除都係＝１
2. (xy2)-3/y-2
=2xy-3/y-2
=2x-3/-2
=-x+3
解釋：因為2xX1=2x;-+=-;--=+
2007-12-11 14:16:30 補充：
1. a-3b/a-2 =1-3b/-2 =-1 3b/2解釋：因為所有數自除都係＝１;- =-;--=
=1-3b/-2
解釋：因為所有數自除都係＝１
2. (xy2)-3/y-2
=2xy-3/y-2
=2x-3/-2
=-x+3
解釋：因為2xX1=2x;-+=-;--=+
2007-12-11 14:16:30 補充：
1. a-3b/a-2 =1-3b/-2 =-1 3b/2解釋：因為所有數自除都係＝１;- =-;--=
參考: Me^^
2007-12-11 7:10 pm
1) a - 3b/a - 2
= a^2 - 2a -3b
= a (a-2) - 3b.
2) (xy2) - 3/y - 2
= 2xy - 3/y -2
= 2x(y^2) - 2y -3
= 2y (xy-1) - 3.
= a^2 - 2a -3b
= a (a-2) - 3b.
2) (xy2) - 3/y - 2
= 2xy - 3/y -2
= 2x(y^2) - 2y -3
= 2y (xy-1) - 3.
收錄日期: 2021-04-14 01:12:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071211000051KK00738