Question 1081694
{{{9k^2-4=0}}}
Difference of two squares,
{{{(3k-2)(3k+2)=0}}}
Two solutions:
{{{3k-2=0}}}
{{{3k=2}}}
{{{k=2/3}}}
and
{{{3k+2=0}}}
{{{3k=-2}}}
{{{k=-2/3}}}