SOLUTION: Find each product if possible. If not possible, write product undefined. 4. [2 1] [3 0] [2 4] [7 4] [1 6] 5. -3 [3 10] [21 24] 6. [9 15 6]

Algebra ->  Matrices-and-determiminant -> SOLUTION: Find each product if possible. If not possible, write product undefined. 4. [2 1] [3 0] [2 4] [7 4] [1 6] 5. -3 [3 10] [21 24] 6. [9 15 6]       Log On


   

Question 177717: Find each product if possible. If not possible, write product undefined.


4. [2 1]
[3 0] [2 4]
[7 4] [1 6]


5. -3 [3 10]
[21 24]

6. [9 15 6]
[-8 2 7] [2 4 0]
[63 -8 1] [-5 0 8]




7. [3 2] [0 1]
[0 0] [4 0]

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
4. [2 1]
[3 0] [2 4]
[7 4] [1 6]
:
%28matrix%281%2C2%2C2%2C1%29%29%28matrix%282%2C2%2C3%2C0%2C7%2C4%29%29=%28matrix%281%2C2%2C-1%2C-4%29%29matrix%282%2C2%2C2%2C4%2C1%2C6%29=%28matrix%281%2C2%2C2%2C20%29%29
:
5. -3 [3 10]
[21 24]
:
-3%28matrix%282%2C2%2C3%2C10%2C21%2C24%29%29=%28matrix%282%2C2%2C-9%2C-30%2C-63%2C-72%29%29
:
[9 15 6]
[-8 2 7] [2 4 0]
[63 -8 1] [-5 0 8]
:
this would be a 1x3 multiplied by a 2x3...which cannot be done PRODUCT UNDEFINED
:
[3 2] [0 1]
[0 0] [4 0]
:
%28matrix%282%2C2%2C3%2C2%2C0%2C0%29%29%28matrix%282%2C2%2C0%2C1%2C4%2C0%29%29=%28matrix%282%2C2%2C-8%2C3%2C0%2C0%29%29