x的平方+x分之5x+2=x+1分之3

问题描述:

x的平方+x分之5x+2=x+1分之3

(5x+2)/(x^2+x)=3/(x+1)
(5x+2)/(x^2+x)=3x/x(x+1)
(5x+2)/(x^2+x)=3x/(x^2+x)
5x+2=3x
2x=-2
x=-1
x^2+x≠0
x≠0 x≠-1
x+1≠0
x≠-1
所以方程无解

tif7ies4u684siu6ers4

(5x+2)/(x^2+x)=3/(x+1)
(5x+2)/(x^2+x)=3x/x(x+1)
(5x+2)/(x^2+x)=3x/(x^2+x)
5x+2=3x
2x=-2
x=-1
x^2+x≠0
x≠0 x≠-1
方程无解