(t - 3 ) ( t + 7 )
= ?
( give me 步驟 )
thx~!!
F.1 數學...2條
2007-11-15 5:35 am
回答 (10)
2007-11-15 5:39 am
✔ 最佳答案
( t - 3) ( t + 7)=t² + 7t - 3t - 10
=t² + 4t - 10
希望冇錯! 有錯請指出
2007-11-14 21:40:50 補充：
中間第2步開始錯左小小..應該係 =t² 7t - 3t - 21=t² 4t - 21眼花睇錯左小小野@@"
參考: 自己
2007-11-15 5:51 am
(t - 3 ) ( t + 7 )
= t² 7t - 3t - 21
=t² 4t - 21
= t² 7t - 3t - 21
=t² 4t - 21
2007-11-15 5:46 am
(t-3) (t+7)
= (t ^2) + ( 7 t) + ( -3 t) + (-21)
= t ^2 + 4 t - 21
[x ^ y = x 的 y次方]
= (t ^2) + ( 7 t) + ( -3 t) + (-21)
= t ^2 + 4 t - 21
[x ^ y = x 的 y次方]
參考: myself
2007-11-15 5:42 am
參考: me
2007-11-15 5:41 am
t(t+7)-3(t+7)
t^2+7t-3t-21
t^2+4t-21
t^2+7t-3t-21
t^2+4t-21
2007-11-15 5:41 am
=t^2+7t-3t-21
=t^2+4t-21
=t^2+4t-21
收錄日期: 2021-04-13 14:30:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071114000051KK03949