Mathematics

Problem

A = \begin{bmatrix} 0 & x & 16 \\ x & 5 & 7 \\ 0 & 9 & x \end{bmatrix}

is singular, then the possible values of

x

are (a) 0, 12, -12 (b) 0, 1, -1 (c) 0, 4, -4 (d) 0, 5, -5