please find AB

Question

matrix A= [3,-2, 0,5] matrix B=[1,7,4,2,3,1]

Answer 1

Please find AB
matrix A= [3,-2, 0,5] matrix B=[1,7,4,2,3,1]

 

You can only multiply two matrices together if the number of columns in the first matrix equals the number of rows in the second matrix.  The product matrix will have the number of rows in A and the number of columns in B.  Hence I assume the problem is a 2x2 matrix times a 2x3 matrix, resulting in a 2x3 matrix:

 

          | 3  -2 |   | 1  7  4 |     | (3*1-2*2)  (3*7-2*3)  (3*4-2*1)   |     | -1  15  10 |

AB =  | 0   5 |   | 2  3  1 |  = | (0*1+5*2) (0*7+5*3) (0*4+5*1) | = | 10  15   5 |