Bonjour,
(x-2-√3)(x-2+√3) = (x-2)²-(√3)² = x²-4x+4-3 = x²-4x+1
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Bonjour,
(x-2-√3)(x-2+√3) = (x-2)²-(√3)² = x²-4x+4-3 = x²-4x+1