Question 78799
{{{ k^2 = 10 }}}

This is a quadratic equation in one variable

It has no linear term, just a quadratic term (k^2) and a constant (10)

You may want to know its solutions which are {{{ k = sqrt(10) }}} and 
{{{ k =  -sqrt(10) }}}  

You did not say what you wanted to know about k^2 = 10 so I am not sure what else to tell you.