解方程[急]..幫手!!!
2012-10-03 2:49 am
回答 (2)
2012-10-03 3:09 am
✔ 最佳答案
1. x=-3 or -0.52.x= 1.5 or 1.75
3.x^2+3x=0
x(x+3)=0
x=-3 or 0
4.x^2-6x+8=0
(x-4)(x-2)=0
x=4 or 2
5.-4x^2+4x-1=0
4x^2-4x+1=0
(2x-1)^2=0
x=0.5(twice)
收錄日期: 2021-04-13 19:01:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121002000051KK00680