# If f(x) = x2

Given: and f(x) = x2 – 2x

To find the value of f(A)

We will substitute x = A in the given equation we get

f(A) = A2 – 2A……………..(i)

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

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

Now, we will find the matrix for 2A, we get

So, Substitute corresponding values from eqn(i) and (ii) in equation f(A) = A2 – 2A, we get

[as rij = aij + bij + cij],

Hence the value of

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