18x^2 - 2y^2 - 6x+2y
點分解?
中三因式分解
2007-01-17 10:16 am
回答 (5)
2007-01-17 10:43 am
✔ 最佳答案
18x^2 - 2y^2 - 6x+2y=2(9x^2 - y^2) - 2(3x-y)
=2(3x+y)(3x-y)-2(3x-y)
=2(3x-y)(3x+y-1)
2007-01-18 5:55 pm
唔錯 唔錯 好過d中七啦
2007-01-17 6:59 pm
18x^2 - 2y^2 - 6x + 2y
= 2 ( 9x^2 - y^2 ) - 6x + 2y
= 2 ( 3x - y )( 3x + y ) - 2 ( 3x - y ) {(a^2-b^2)=(a+b)(a-b)}
= [ 2 ( 3x + y ) - 2 ] ( 3x - y )
= 2 ( 3x + y - 1 )( 3x - y )
= 2 ( 9x^2 - y^2 ) - 6x + 2y
= 2 ( 3x - y )( 3x + y ) - 2 ( 3x - y ) {(a^2-b^2)=(a+b)(a-b)}
= [ 2 ( 3x + y ) - 2 ] ( 3x - y )
= 2 ( 3x + y - 1 )( 3x - y )
參考: my knowledge
2007-01-17 2:25 pm
18x^2 - 2y^2 - 6x+2y
=2(9x^2 - y^2) - 2(3x-y)
=2(3x+y)(3x-y)-2(3x-y)
=2(3x-y)(3x+y-1)
=2(9x^2 - y^2) - 2(3x-y)
=2(3x+y)(3x-y)-2(3x-y)
=2(3x-y)(3x+y-1)
2007-01-17 11:33 am
The equivalent equation is:
(6x - 2y)(3x + y - 1)
(6x - 2y)(3x + y - 1)
收錄日期: 2021-05-02 13:32:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070117000051KK00309