SOLUTION: Please help me solve this problem. Find the product of AB if: {{{A = (matrix(2,3, 0, -5, 10, -1, 6, -9))}}} {{{B = (matrix(3,1,-9,0,4))}}}

Algebra ->  Matrices-and-determiminant -> SOLUTION: Please help me solve this problem. Find the product of AB if: {{{A = (matrix(2,3, 0, -5, 10, -1, 6, -9))}}} {{{B = (matrix(3,1,-9,0,4))}}}       Log On


   

Question 393074: Please help me solve this problem.
Find the product of AB if:

A+=+%28matrix%282%2C3%2C++0%2C+-5%2C+10%2C+-1%2C+6%2C+-9%29%29
B+=+%28matrix%283%2C1%2C-9%2C0%2C4%29%29


Found 2 solutions by madhan_math, Edwin McCravy:
Answer by madhan_math(34) About Me  (Show Source):
You can put this solution on YOUR website!
A= 0 -5 10 and B = -9
-1 6 -9 0
4
Note: The order of first matrix is 2x3 (2 rows and 3columns) and that of second is 3x1(3rows and 1 column).. therefore the result matrix order is in the order 2x1
Procedure: multiplying the corresponding elements in first row of A with B then second row of A with B. i.e.,
AB= (0x-9)+(-5x0)+(10x4)
(-1x-9)+(6x0)+(-9x4)
AB= 40
-27

Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!

The formula is:



Plug in and get: 

 
Edwin