Question

Matrix Problem, help! Question below

Answer 1

whats the question

Answer 2

not possible

Answer 3

What about this one?
Find AB,

Answer 4

matrix multiplication
in order to determine whether or not it is possible, just look at the dimensions of the matrix

using first question as an example
B - 3 x2
A-1x 3

BA -> 3x2 - 1x3

if the inner 2 numbers dont match, then its not possible

still using first question as example

AB- > 1x3 -3x2
inner 2 numbers match so matrix multiplication is possible

Answer 5

i hope i didnt screw up the dimensions

Answer 6

oh, i should add, if matrix multiplication is possible, the resulting matrix will have the dimensions of the last 2 numbers

so from AB
the dimension of the resulting matrix would be 1x2