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</pre><p>The big deal is that you should care about speed and you should care even more about accuracy.  BACKSLASH relies on matrix
            factorization (LU, CHOL, QR, or other specialized methods).  It's faster and more reliable than multiplying by the inverse,
            particularly for large matrices and sparse matrices.  Here's an illustration of how pathetic inv(A)*b can be.
         </p><pre class="codeinput">A = gallery (<span class="string">'frank'</span>,16) ; xtrue = ones (16,1) ; b = A*