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depicts a 3×3 identity matrix, I. Figure 6 — Identity Matrix (Image By Author) Multiplying a matrix by its inverse gives the Identity Matrix, I, i.e. A A⁻¹ = I, where A⁻¹ means the inverse of A. Use the expression in Figure 7 to calculate the inverse of a 2×2. Figure 7 –2×2 Matrix Inverse (Image By