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If A = [(3,x),(0,1)] and [(9,16),(0,-y)], find x and y when A^2 = B.

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If A = [(3,x),(0,1)] and [(9,16),(0,-y)], find x and y when A2 = B.

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Given :

By equality of matrices, 

4x = 16 and 1 = -y

x = 4 and y = -1

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