Answer :


We need to prove A2 + A = A (A + I).

Let us evaluate the LHS and the RHS one at a time.

To find the LHS, we will first calculate A2.

We know A2 = A × A

Now, the LHS is A2 + A.

To find the RHS, we will first calculate A + I.

Now, the RHS is A(A + I).

Thus, A2 + A = A (A + I).

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