Question 143696
x+sqrt(x)-6/25=0

let z^2=x

z^2+z-6/25=0

{{{z = (-1 +- sqrt(1+24/25))/(2) }}}
{{{z = (-1 +- sqrt(49/25))/(2) }}}
{{{z = (-1 +- 7/5)/(2) }}}
z=-12/10 or z=1/5
then z=1/5 and x=1/25

Answer: the nimber is 1/25