Annie M.

asked • 03/24/15

Given the matrices...Find 2A-3B

A= [1 2]
     [-1 0]
B=[-1 -3]
    [4 1]
first row=?
second row=?
 
(the brackets for each A and B should be connected)

1 Expert Answer

By:

Mark M. answered • 03/24/15

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2A
 
2 4
-2 0
 
3B
 
-3 -9
12 3
 
2A - 3B
 
2-(-3)  4-(-9)
-2-12   0-3
 
 
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Annie M.

so is the 1st row -14 and the second row -3?
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03/24/15

Mark M.

  5   13
-14  -3
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03/24/15

Annie M.

sorry but I still don't understand what exactly is suppose to be put in the first row and what exactly is suppose to be put in the second row
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03/24/15

Mark M.

The first (top) row is 5 13
The second (bottom) row is -14 -3
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03/24/15

Annie M.

thank you!
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03/24/15

Mark M.

You are welcome!
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03/24/15

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