Simplify the Matrix ([[-6,-2]]+[[-8,9]])

$([\begin{array}{c} - 6 & - 2 \end{array}] + [\begin{array}{c} - 8 & 9 \end{array}])$

Matrices can only be multiplied if the number of columns in the first matrix is equal to the number of rows in the second matrix. The matrices cannot be multiplied.