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    Matrix A is 3x3 whose rows are r1=(0,1,0) & r2=(0,0,1). what is r3 if the...

    ...characteristic polynomial of A? abs(A-?I) = -?^3 + 2?^2 + 3? + 7 a) (6,9,21) b) (14,6,4) c) (7,3,2) d) none Please Explain.
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