help please, thanks Find all values of ( k ) so that [ left[begin{array}{cc} k & 2 3 & k+1 end{array} ight]-I_{2} ] is

help please, thanks Find all values of \( k \) so that \[ \left[\begin{array}{cc} k & 2 \\ 3 & k+1 \end{array}\right]-I_{2} \] is invertible To enter your answer, first select 'always', 'never', or whether \( k \) should 2 answers