x^4 - 49 factor reg trinomials?
回答 (2)
2009-08-25 7:05 pm
✔ 最佳答案
a^2 - b^2 = (a + b)(a - b)x^4 - 49
= (x^2)^2 - 7^2
= (x^2 + 7)(x^2 - 7)
2009-08-26 2:07 am
( x^2 - 7 ) ( x^2 + 7 )
( x - â7 ) ( x + â7 ) ( x^2 + 7 )
( x - â7 ) ( x + â7 ) ( x^2 + 7 )
收錄日期: 2021-05-01 12:44:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090825110230AAITEOH