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ColonelChabert
@ColonelChabert
May 2019
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Bonjour je n'arrive pas la première partie question 1
merci :)
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Sulky
Bonsoir,
Aire du carré ABCD = 5 x 5 = 25 cm²
Aire du carré MNPQ =
Aire du carré ABCD - 4 fois l'AIRE des 4 triangles.
Soit,
25 - 4((5 - x)*x)/2
(aire ABCD - 4 x (base x hauteur)/2
= 25 - 4(5x - x²)/2
= 25 - (20x - 4x²)/2
= 25 - (10x - 2x²)
= 25 - 10x + 2x²
= 2x² - 10x + 25
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Bonjour, Je suis en classe de seconde et j'ai besoin d'aide concernant la question 2 de ce DM s, il est ci-joint. J'accepte tout type d'avancement merci .
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Aire du carré ABCD = 5 x 5 = 25 cm²
Aire du carré MNPQ =
Aire du carré ABCD - 4 fois l'AIRE des 4 triangles.
Soit,
25 - 4((5 - x)*x)/2
(aire ABCD - 4 x (base x hauteur)/2
= 25 - 4(5x - x²)/2
= 25 - (20x - 4x²)/2
= 25 - (10x - 2x²)
= 25 - 10x + 2x²
= 2x² - 10x + 25