If `A=[[2,9],[4,3]] and B= [[1,5],[7,2]]` find AB-BA

If A=[[2,5],[3,7]] and B=[[1,3],[4,8]] ,then find AB.

If A=[[1,2],[-3,4]] and B=[[5],[-1]] then find AB

If A=[[0,-1],[0,2]] and B=[[3,5],[0,0]], then find A.B and B.A

if A=[[1],[2],[3]] and B=[[3,1,2]] then fiind AB&BA

If A=[[2,1,3],[4,1,0]] and B=[[1,-1],[0,2],[5,0]] find AB and BA.

If A=[[3,6,-5]] and B=[[4] , [7] , [2]] then find AB and BA

If A=[[3,9,0],[1,8,-2]] and B=[[4,0,2],[7,1,4]] ,find A+B and A-B .

If A=[[1,2],[3,-4],[5,6]] and B=[[4,5,6],[7,-8,2]] , is AB=BA? Also find AB and BA.

If A=[[2,1],[3,7]] and B=[[-1,2],[3,5]] ,then prove that (AB)'=B'A'

If A=[[2,-1,3],[-4,5,1]] and B=[[2,-4],[-1,5],[3,1]] then (a) Only AB is defined (c) AB and BA both are defined (b) Only BA is defined (d) AB and BA both are not defined