✔ 最佳答案
29a+90+189a
=218a+90
2007-02-27 21:05:38 補充:
It's very simple.
2007-02-28 09:15:07 補充:
If added factorize into the factor:29a+90+189a=218a+90 =2(109a+45)
2007-02-28 09:16:50 補充:
If added factorize into the factor:29a+90+189a=218a+90 =2(109a+45)