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IGCSE Computer Science
IP vs MAC addresses | IGCSE Computer Science Past Paper Solution
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![If A = [[-1,2],[3,4]] and B = [[2,-3],[5,1]] , show that AB≠BA](http://i.ytimg.com/vi/Yx1gf8nhNMU/mqdefault.jpg "If A = [[-1,2],[3,4]] and B = [[2,-3],[5,1]] , show that AB≠BA")
![If A = [[2,-1],[3,2]] and B = [[0,4],[-1,7]] , find (3A^2 - 2B + I).](http://i.ytimg.com/vi/0DhveErBAHA/mqdefault.jpg "If A = [[2,-1],[3,2]] and B = [[0,4],[-1,7]] , find (3A^2 - 2B + I).")
