[求助] 求助：解一元四次方程 已有5人参与

5楼: Originally posted by 1475644394 at 2015-10-09 12:23:45
费拉里法解一元四次方程。x^4+bx^3+cx^2+dx+e=0可得^2=(1/4b^2-c+y)x^2+(1/2by-d)x+1/4y^2-e,y是一个参数，(1/2by-d)^2-4(1/4b^2-c+y)(1/4y^2-e)=0把y值带入上式可解得x值
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2楼: Originally posted by 智慧哥 at 2015-10-09 11:01:07
我晕，