[-3 1 3] [-3 -5 -3]

Question

A=[-2 5 -4] B=[2 -1 4]
If[4 -2 -1]and [-5 -2 -5]find
BA

I add the number and I came out with 666 468 and 946 I think I'm wrong Please help...

Answer 1

It is very confusing to try to write a matrix in jishka's format.

Try reposting, and say something like

matrix A is
3 1 3
-3 -5 -3

or something like :
matrix M is

1 2
3 6
4 5

I cannot make out your matrices.

I have no idea what
if[4 -2 -1] and [-5 -2 -5] means

Answer 2

Matrix A
-3 1 3
-2 5 -4
4 -2 -1

And

Matrix B
-3 -5 -3
2 -1 4
-5 -2 -5

find If BA

Answer 3

first element of answer matrix
= -3(-3) + 1(2) + 3(-5) = -4

the middle element of bottom row of answer matrix
= 4(-5) - 2(-1) - 1(-2) = -16

the last element in second row of answer matrix
= -2(-3) +5(4) -4(-5) = 46

You should have learned the "pattern" for multiplying matrices