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" If "A=[[1,0,2],[0,2,1],[2,0,3]]," then...

" If "A=[[1,0,2],[0,2,1],[2,0,3]]," then show that the matrix "A" is a root of the polynomial "f(x)=x^(3)-6x^(2)+7x+

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If A=[102021203], then show that A is a root of the polynomial f(x)=x^(3)-6x^(2)+7x+2

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