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A=[[0, oo],[0,0]] , (A+I)^50-50A=[[p,q],...

`A=[[0, oo],[0,0]]` , `(A+I)^50-50A=[[p,q],[r, s]]`, `p^2+q^2+r^2+s^2=?`

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I. 2p^(2) + 20p+50 = 0 II. q^(2) = 25