Question

dada as matrizes A=(2 3 5 1) B=(3 1 2 1)determine (A+B)(A-B)

Answer 1

A [ 2 3 5 1 ] + B [ 3 1 2 1 ] = A+B=[ 5 4 7 2 ]
A [ 2 3 5 1 ] - B [ 3 1 2 1 ] = A-B = [ -1 2 3 0 ]