If A={:[(1,x,-2),(2,2,4),(0,0,2)]:}and A...

If `A={:[(1,x,-2),(2,2,4),(0,0,2)]:}`and `A^(2)+2I_(3)=3A` find x, here `I_(3)` is the unit matrix of order 3.

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The correct Answer is:

x = 0

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