Solve 3x^2 - 21x = 0?
回答 (3)
2009-05-27 6:00 pm
✔ 最佳答案
3x(x - 7)= 0x= 0, 7
2009-05-28 1:29 am
( 3x ) ( x - 7 ) = 0
x = 0 , x = 7
x = 0 , x = 7
2009-05-28 1:03 am
3x^2 - 21x = 0
3(x^2 - 7x) = 0
x^2 - 7x = 0/3
x(x - 7) = 0
x = 0
x - 7 = 0
x = 7
â´ x = 0, 7
3(x^2 - 7x) = 0
x^2 - 7x = 0/3
x(x - 7) = 0
x = 0
x - 7 = 0
x = 7
â´ x = 0, 7
收錄日期: 2021-05-01 12:26:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090527095522AAva2f7