Question: how to do it? 1. Let matrix A = -2 1 1 and I = Co Is 2A2 - 5A - 31 = (A -

how to do it?

how to do it? 1. Let matrix A = -2 1 1

1. Let matrix A = -2 1 1 and I = Co Is 2A2 - 5A - 31 = (A - 31) (2A + 1)

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