If find the value of x.

Given :

To find : x

Formula used :

Where c_ij = a_i1b_1j + a_i2b_2j + a_i3b_3j + ……………… + a_inb_nj

=

= = =

= =

=

Equating similar terms in the two matrices, we get

x = 13

x = 13