Q. 64.4( 16 Votes )

Find the inverse

Answer :

We know that

Adjoint of the matrix A = [aij]n×n is defined as the transpose of the matrix [Aij]n×n where Aij is the co-factor of the element aij.


Let’s find the cofactors for all the positions first-


Here, A11 = 2, A12 = 3, A21 = -5, A22 = -1.


Adj A =


=


And |A| = -1(2)-(-3)(5) = 13


So


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