January 2021 0 69 Report
Bonjour, Equation du 2nd degré

4x² - 20x + 25
Δ = b² - 4ac
= (-20)² - 4x4x25
= 400 - 400
= 0

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Factoriser ax² + bx + c
Δ = 0, donc a(x - x0)

(2x - 5)²
4(x - 2,5) Est-ce ça ? Faut-il rajouter le carré ? Mettre en fraction 2,5 (20:8) ?
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