WeBWorK Standalone Renderer

Find the $QR$ factorization of the given matrix.

$\left[\begin{array}{c} -8\cr 4\cr -8 \end{array}\right] =$ $\left[\Rule{0pt}{3.6em}{0pt}\right.$ $\left]\Rule{0pt}{3.6em}{0pt}\right.$ $\left[\Rule{0pt}{1.2em}{0pt}\right.$ $\left]\Rule{0pt}{1.2em}{0pt}\right.$

You can earn partial credit on this problem.