Answer :

Given :

To find : matrix A

Formula used :

Where c_{ij} = a_{i1}b_{1j} + a_{i2}b_{2j} + a_{i3}b_{3j} + ……………… + a_{in}b_{nj}

IF XA = B, then A = X^{-1}B

. A =

A =

To find

Determinant of given matrix = = 5(3) – (-7)(-2) = 15 – 14 = 1

Adjoint of matrix =

= × =

=

A = =

A = = =

A =

A =

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