Question 328431
{{{r/3-3/r=0}}}
{{{r/3=3/r}}}
{{{r^2=9}}}
{{{r=0 +- 3}}}
The solutions are {{{highlight(r=3)}}} and {{{highlight(r=-3)}}}.
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Verify the solution.
{{{r=3}}}
{{{3/3-3/3=0}}}
{{{1-1=0}}}
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{{{r=-3}}}
{{{-3/3-(-3/3)=0}}}
{{{-1+1=0}}}
{{{0=0}}}