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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

#### 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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