(x-5)(x-1)(x+1)(x+5)+144=?
回答 (2)
2018-07-28 4:09 pm
✔ 最佳答案
(x－5)(x－)(x+1)(x+5)+144=(x^2－5)(x^2－1)+144
=x^4－26x^2+25+144
=x^4－26x^2+169
=(x^2－13)^2
2018-07-28 4:03 pm
(x+1)(x-1)=x²-1
(x-5)(x+5)=x²-25
(x²-1)+(x²-25)+144=2x²+118
A:2x²+118
(x-5)(x+5)=x²-25
(x²-1)+(x²-25)+144=2x²+118
A:2x²+118
收錄日期: 2021-04-30 22:41:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20180728075155AAudUGg