SOLUTION: a.For matrix A = ( 5 7 2 ) ( 9 6 4 ) ( 3 2 1 ) and B = (4 7 3) (1 1 3) (8 2 4) find 3A − 2B. b. For matrix C = (1 7 2 ) (5 0 7 ) (4 2 6 ) and D

Algebra ->  Matrices-and-determiminant -> SOLUTION: a.For matrix A = ( 5 7 2 ) ( 9 6 4 ) ( 3 2 1 ) and B = (4 7 3) (1 1 3) (8 2 4) find 3A − 2B. b. For matrix C = (1 7 2 ) (5 0 7 ) (4 2 6 ) and D      Log On


   

Question 1112697: a.For matrix A =
( 5 7 2 )
( 9 6 4 )
( 3 2 1 ) and
B =
(4 7 3)
(1 1 3)
(8 2 4)
find 3A − 2B.

b. For matrix C =
(1 7 2 )
(5 0 7 )
(4 2 6 ) and
D =
(9 3 4)
(2 6 3)
(7 2 1)
find CD.

Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
a)  Into each cell of the 3x3 matrix  (3A - 2B)  put the difference "3a - 2b" of the corresponding values from the corresponding cells 

    of the original matrices  A  and  B.


    There is NOTHING EASIER.



b)  Open your textbook.

    Read and learn the definition of the matrix product from there.


    Then complete your assignment on your own.