If and then find
a11 b11 + a22 b22
A = [aij] = …......(1)
B = [bij] = …......(2)
Given, A = [aij] = B = [bij] =
Now, Comparing with equation (1) and (2)
a11 = 2, a22 = 4, b11 = 2, b22 = 4
a11 b11 + a22 b22 = 2 × 2 + 4 × 4 = 4 + 16 = 20