1. 9-42g+49g²
2. 25s²-40st+16t²
(＊詳細步驟）
因式分解．．．
2006-11-01 7:34 am
回答 (4)
2006-11-01 7:37 am
✔ 最佳答案
1)9 - 42g + 49g^2
= 3^2 - 2(3)(7g)+(7g)^2
= (3-7g)^2
Since (A-B)^2 = A^2 - 2AB + B^2
2)
25s^2-40st+16t^2
= (5s)^2 - 2(5s)(4t) + (4t)^2
= (5s-4t)^2
The same rule applies
2006-11-01 9:30 pm
1)
9 - 42g + 49g^2
= 3^2 - 2(3)(7g)+(7g)^2
= (3-7g)^2
Since (A-B)^2 = A^2 - 2AB + B^2
2)
25s^2-40st+16t^2
= (5s)^2 - 2(5s)(4t) + (4t)^2
= (5s-4t)^2
if it cannot help u send amail to me
9 - 42g + 49g^2
= 3^2 - 2(3)(7g)+(7g)^2
= (3-7g)^2
Since (A-B)^2 = A^2 - 2AB + B^2
2)
25s^2-40st+16t^2
= (5s)^2 - 2(5s)(4t) + (4t)^2
= (5s-4t)^2
if it cannot help u send amail to me
2006-11-01 8:00 am
1. 9 - 42g + 49g²
= (3 - 7g)²
2. 25s² - 40st + 16t²
= (5s - 4t)²
= (3 - 7g)²
2. 25s² - 40st + 16t²
= (5s - 4t)²
2006-11-01 7:38 am
1. 9-42g+49g²
=49g^2-42g+9
=(7g)^2-2(7g)(3)+3^2
=(7g-3)^2
2.25s²-40st+16t²
=(5s)^2-2(5s)(4t)+(4t)^2
=(5s-4t)^2
=49g^2-42g+9
=(7g)^2-2(7g)(3)+3^2
=(7g-3)^2
2.25s²-40st+16t²
=(5s)^2-2(5s)(4t)+(4t)^2
=(5s-4t)^2
參考: me
收錄日期: 2021-04-22 00:13:50
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061031000051KK05354