X²-10x-25=0整數根（方程）?
回答 (1)
2017-10-29 6:25 am
Sol
x^2－10x+25=0
x^2－2*5x+5^2=0
(x－5)^2=0
x=5 (重根)
x^2－10x+25=0
x^2－2*5x+5^2=0
(x－5)^2=0
x=5 (重根)
收錄日期: 2021-04-24 00:48:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20171028114034AAimV0Q