The augmented matrix
AA1 AB1 AC1 ... AH1 | AI1
AA2 AB2 AC2 ... AH2 | AI2
AA3 AB3 AC3 ... AH3 | AI3
..
..
AA8 AB8 AC8 ... AH8 | AI8
I attempted to solve with the two operations,
=MINVERSE(AA1:AH8) saved in AA11:AH18
=MMULT(AA11:AH18,AI1:AI8)
in Excel, but all I got was garbage. Some ove the cells were very
large (1E14). When I tediously solved the matrix using elementary row
operations, there was virtually no error. Did I do something wrong?
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