數學問題 : 234450R²+288900R-38050 = 0

delta = 119146500000
(B^2-4AC)^(1/2)=345176(appoix.)
R=(-(B)+(B^2-4AC)^(1/2))/2A
R=(-(B)-(B^2-4AC)^(1/2))/2A
R = 0.12 or R = -1.352

2007-03-20 16:18:40 補充：
R = 0.1200172 and -1.352263

This is very simple, you can find the answer in these two web sites,

http://en.wikipedia.org/wiki/Quadratic_equation

http://zh.wikipedia.org/w/index.php?title=%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B&variant=zh-hk