1. 3m-12n
2. -ab-2ac
3. ab+bc+bd
4. xy+y+x+1
5. mr-nr+5m-5n
6. (3x-4y)(3x+4y)
我想你地幫我解答這幾條因式分解的題目！
2007-04-10 9:04 pm
回答 (3)
2007-04-10 9:08 pm
✔ 最佳答案
1. 3m-12n
3 ( m - 4n)
2.
-ab-2ac
= -a ( b + 2c)
3.
ab+bc+bd
= b (a + c + d)
4.
xy+y+x+1
= x( y + 1) + (y + 1)
= (y + 1) (x + 1)
5.
mr-nr+5m-5n
= r ( m - n) +5 ( m- n)
= (r + 5) ( m - n)
6.
(3x-4y)(3x+4y)
= 9x^2 - 16y^2
= (3x-4y)(3x+4y)
2007-04-10 9:12 pm
1. 3m-12n
=3(m-4n)
2. -ab-2ac
=-a(b+2c)
3. ab+bc+bd
=b(a+c+d)
4. xy+y+x+1
=y(x+1)+x+1
=(x+1)(y+1)
5. mr-nr+5m-5n
=r(m-n)+5(m-n)
=(m-n)(r+5)
6. (3x-4y)(3x+4y)
已經因式分解左la~
=3(m-4n)
2. -ab-2ac
=-a(b+2c)
3. ab+bc+bd
=b(a+c+d)
4. xy+y+x+1
=y(x+1)+x+1
=(x+1)(y+1)
5. mr-nr+5m-5n
=r(m-n)+5(m-n)
=(m-n)(r+5)
6. (3x-4y)(3x+4y)
已經因式分解左la~
參考: 我自己做
收錄日期: 2021-05-01 10:07:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070410000051KK01894