); font-size: 12px;">L = </span></div><div style="white-space: pre; font-style: normal; color: rgb(64, 64, 64); font-size: 12px;">   1.0000e+00            0            0            0
  -1.0000e+00   1.0000e+00            0            0
   5.0000e-01          Inf   1.0000e+00            0
  -2.0000e+00          Inf          NaN   1.0000e+00
</div></div></div></div></div></div></div></div>
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% Here is the previously solved system.

A = [2 0 4 3 ; -4 5 -7 -10 ; 1 15 2 -4.5 ; -2