WeBWorK Standalone Renderer

Find a non-zero $2 \times 2$ matrix $A$ such that $A^2 = \left[\begin{array}{cc} 0 &0\cr 0 &0 \end{array}\right]$ .

$A =$ $\left[\Rule{0pt}{2.4em}{0pt}\right.$ $\left]\Rule{0pt}{2.4em}{0pt}\right.$