00 600 70 0 70 0 6] 070 090 LO O LLO0L 0 0 70 0 60 0 7 0 600 700 70 090 007 0 070 7 0 0600 06 006 070 OLO 090 0 0 LLO OLLO OLLO 0 9 0 0 0 0 9. 000 000 900 070 009 007 007 070 007 000 000 0 0 0 O 090 009 900 090 090 0 0 9 0 0 9 O 900 090 0 70 007 O 0 0 LLO 09. O 900 090 |0 0 0 JL0 0 LJ0 0 9JO Find all 3 x 3 diagonal matrices A that satisfy A²-13A +421 = 0.

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