Question

Find the product, if possible.

BA, if A= [-1 -2 -3]
[-5 -3 5]
[-4 -4 -1]

B= [-2 4 2]
[3 2 3]
[1 5 4]

Answer 1

since this is a 3*3 matrix multiplication you can find the product

Answer 2

the number on the row 1 column 1 can be calculated by

multiplyting the entries in the column 1 in B and the row 1 in a
as such

(-2)(-1) + (4)(-5)+(2)(-4) = 10

Answer 3

to it looks like this so far

[10 ]
[ ]
[ ]

Answer 4

to find row2 column1 (usually noted as..\[a_{21}\])

Answer 5

you multiply [3 2 3] by
[-1]
[-5]
[-4]

so you will get (3)(-1)+(2)(-5)+(3)(-4) = -25

Answer 6

so you will get

[10 ]
[25 ]
[ ]

Answer 7

you just keep doing this until everything is filled out

Answer 8

oops I meant -25

Answer 9

also, the first number was actually -26 when I recalculated it

Answer 10

the answer should be

[-26 -16 24]
[-25 -24 -2]
[-42 -33 18]