#How to solve 3x3 matrix on mu calculator?

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deep glen
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I try to get it to show me the chart that other scientific calculators show but It doesn't appear to select anything. If I click the down arrow, it appears a text that says “ROW”, then if i click the down arrow it says “COLUMN=“, then if i click the down arrow it says “MAT1, 1” Anyone familiar with this model?

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light pathBOT
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@deep glen

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