Si A= √2+ √3 --> A²=5+ 2·√6 --> A²-5 = 2·√6 -->
(A²-5)² = (2·√6)² --> A^4 - 10A+25=24 --> A^4 - 10A + 1=0
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Si A= √2+ √3 --> A²=5+ 2·√6 --> A²-5 = 2·√6 -->
(A²-5)² = (2·√6)² --> A^4 - 10A+25=24 --> A^4 - 10A + 1=0