+0  
 
+1
50
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first

 

 

second

 Oct 4, 2020
 #1
avatar+31098 
+2

In the first part of the question the filled in box for BC is incorrect!

 

B = [-4, 2

        0, 5]

C = [0, 4, -1

        1, 0, 4]

 

B*C = [-4*0+2*1, -4*4+2*0,  -4*(-1)+2*4

           0*0+5*1,  0*4+5*0,    0*(-1)+5*4]

 

B*C = [2, -16, 12

           5,  0,   20]

 

For the second part, A - B means subtract corresponding elements in A and B.

 Oct 4, 2020
edited by Alan  Oct 4, 2020

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