1. 3m+2n-4m-5m
2. 10ab-7ab+5mn-7ab
請列出步爪
我做完不過唔知對不對
數學問題!多項式+-
2006-10-22 6:46 pm
回答 (7)
2006-10-22 7:34 pm
✔ 最佳答案
1. 3m+2n-4m-5m= 3m-4m-5m+2n
= -1m-5m+2n
= -6m+2n / 2n-6m
↑對
2. 10ab-7ab+5mn-7ab
= 10ab-7ab-7ab+5mn
= 3ab-7ab+5mn
= -4ab+5mn / 5mn-4ab
↑對
參考: 我一定對，因為我學過......
2006-10-22 7:05 pm
1.3m+2n-4m-5m
=3m-4m-5m+2n
= -6m+2n
2.10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
= －4ab+5mn
=3m-4m-5m+2n
= -6m+2n
2.10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
= －4ab+5mn
2006-10-22 6:56 pm
1. 3m+2n-4m-5m
=3m-4m+2n-5n
=-1m+-3n
2. 10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
=-4ab+5mn
=3m-4m+2n-5n
=-1m+-3n
2. 10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
=-4ab+5mn
2006-10-22 6:54 pm
1.3m+2n-4m-5m
=3m-4m-5m+2n
= -6m+2n
2.10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
= -4ab+5mn
=3m-4m-5m+2n
= -6m+2n
2.10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
= -4ab+5mn
2006-10-22 6:53 pm
1. 3m+2n-4m-5m
=-1m-5m+2n
=-6m+2n
2. 10ab-7ab+5mn-7ab
=17ab-7ab+5mn
=10ab+5mn
=-1m-5m+2n
=-6m+2n
2. 10ab-7ab+5mn-7ab
=17ab-7ab+5mn
=10ab+5mn
2006-10-22 6:52 pm
1. (3m-4m-5m) +2n = -6m+2n
= -2 (3m-n)
2. 10ab-7ab+5mn-7ab= (10ab-7ab-7ab) +5mn
=-4ab+5mn
2006-10-22 10:53:58 補充：
樓上個位抄錯題目, -.-''
= -2 (3m-n)
2. 10ab-7ab+5mn-7ab= (10ab-7ab-7ab) +5mn
=-4ab+5mn
2006-10-22 10:53:58 補充：
樓上個位抄錯題目, -.-''
參考: me
2006-10-22 6:52 pm
1.
3m-4m+2n-5n
= -1m-3n
ANS:-1m-3n
2.
10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
=-4ab+5mn
ANS:-4ab+5mn
希望可以幫到你啦~~^^
2006-10-22 11:09:47 補充：
哈哈...樓下果位,唔該哂你..我唔小心抄錯左tim!sorry~3m 2n-4m-5m=(3m-4m-5m) 2n=-6m 2n希望岩啦~
3m-4m+2n-5n
= -1m-3n
ANS:-1m-3n
2.
10ab-7ab+5mn-7ab
=10ab-7ab-7ab+5mn
=-4ab+5mn
ANS:-4ab+5mn
希望可以幫到你啦~~^^
2006-10-22 11:09:47 補充：
哈哈...樓下果位,唔該哂你..我唔小心抄錯左tim!sorry~3m 2n-4m-5m=(3m-4m-5m) 2n=-6m 2n希望岩啦~
參考: 即場計~
收錄日期: 2021-04-13 16:53:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061022000051KK01283