1/5x+2=[x-(1/5x+2)]/3唉,马上要交的,帮个忙啊,

题目详情

1/5x+2=[x-(1/5x+2)]/3
唉,马上要交的,帮个忙啊,

▼优质解答

答案和解析

1/(5x+2)=[x-1/(5x+2)]/3
3/(5x+2)=x-1/(5x+2)
3/(5x+2)+1/(5x+2)=x
4/(5x+2)=x
5x^2+2x=4
5x^2+2x-4=0
x=(-1±√21)/5
经检验x=(-1±√21)/5 是方程的解

看了 1/5x+2=[x-(1/5...的网友还看了以下：