SOLUTION: Please help me find 2A*B and 2B*A from the following: p.s. A and B are matrices A: 2 3 6 4-2 0 B: 1 0 1 0 1 0 2 1 0 Thank you

Algebra ->  Matrices-and-determiminant -> SOLUTION: Please help me find 2A*B and 2B*A from the following: p.s. A and B are matrices A: 2 3 6 4-2 0 B: 1 0 1 0 1 0 2 1 0 Thank you      Log On


   

Question 205232: Please help me find 2A*B and 2B*A from the following:
p.s. A and B are matrices
A:
2 3 6
4-2 0
B:
1 0 1
0 1 0
2 1 0
Thank you
Answer by alicealc(293) About Me  (Show Source):
You can put this solution on YOUR website!
A=%28%0D%0Amatrix%282%2C3%2C%0D%0A2%2C3%2C6%2C%0D%0A4%2C-2%2C0%29%0D%0A%29
2A=

B=%28%0D%0Amatrix%283%2C3%2C%0D%0A1%2C0%2C1%2C%0D%0A0%2C1%2C0%2C%0D%0A2%2C1%2C0%29%0D%0A%29
2B=

2A*B=
=
=
=%28matrix%282%2C3%2C%0D%0A28%2C+18%2C+4%2C%0D%0A8%2C-4%2C+8%29%29

2 matrices can be multiplied if number of columns in 1st matrix = number of rows in 2nd matrix
so, there is no results for 2B*A because there are 3 columns in matrix 2B and there are 2 rows in matrix A