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If `A = [(2,1,-1),(0, 1,-2)]` Find `A.A^T` Where `A^T` is the Transpose of Matrix a - ICSE Class 10 - Mathematics

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Question

If `A = [(2,1,-1),(0, 1,-2)]` find `A.A^t` where `A^t` is the transpose of matrix A

Solution

A =`[(2, 1,-1),(0, 1,-2)]`

`A^t = [(2,0),(1,1),(-1,-2)]`

`A.A^t = [(2,1,-1)][(2,0),(1,1),(-1,-2)]`

`= [(4 + 1 + 1,0 + 1 + 2),(0 + 1 + 2, 0 + 1 + 4)]`

`= [(6,3),(3, 5)]`

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Solution If `A = [(2,1,-1),(0, 1,-2)]` Find `A.A^T` Where `A^T` is the Transpose of Matrix a Concept: Multiplication of Matrix.
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