Answer :


To prove A2 –7A + 10I3 = 0

Here I3 is an identity matrix of size 3

Now, we will find the matrix for A2, we get

[as cij = ai1b1j + ai2b2j + … + ainbnj]

So, Substitute corresponding values in equation

A2 –7A + 10I3, we get

[as rij = aij + bij + cij],

Hence the A2 –7A + 10I3 = 0 (Proved)

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