Question 896056
Square TWICE.


{{{sqrt(x+13)-sqrt(x-2)=3}}}
{{{sqrt(x+13)=sqrt(x-2)+3}}}
{{{x+13=(x-2)+6sqrt(x-2)+9}}}----First squaring
{{{x+4=x-2+6sqrt(x-2)}}}
{{{6=6sqrt(x-2)}}}
{{{1=sqrt(x-2)}}}
{{{1=x-2}}}------Second squaring
{{{highlight(x=3)}}}