Question 100440
{{{25x^2=13}}}
.
{{{25x^2/25=13/25}}}
.
{{{x^2=13/25}}}
.
{{{sqrt(x^2)=sqrt(13/25)}}}
.
{{{x=sqrt(13)/sqrt(25)}}}
.
{{{x=sqrt(13)/5}}} which is positive and negative