# ALGEBRA-IDENTITY MATRIX

**Tutor description**

Def Consider the square matrix A The matrix A is invertable if and only if there is a matrix B such that AxB = BxA (Identity Matrix) [1 0] [0 1] = I [1 0 0] [0 1 0] = I Identity matrix [0 0 1] We use the notation A^-1 To find A^-1 Use elementary row

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