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Summersunshine
@Summersunshine
May 2019
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Hey salut ! Encore un exercice de Maths ou je bloque. Vous pourriez m'aider ?
C'est l'exercice 43
Niveau 3ème, Mathématique.
Merci.
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Verified answer
Bonjour,
1) il suffit de développer, tu as le résultat à trouver,
(x-2)² = (a-b)² =a²-2ab+b² = x²-4x+4
(x-3)(x-4) double distributivité vue depuis la 4eme
2) 9998²-9997 * 9996 = (x-2)²-(x-3)(x-4) = 3x-8
avec x = 10 000
(10 000-2)² - (10 000-3)(10 000-4) = 3x-8 = 3*10 000-8 = 29992
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Summersunshine
Merci beaucoup ^^ il fait vraiment que je retravaille les Maths à fond pendant les vacances.
Summersunshine
Ça veut dire quoi *
nini999
* = multiplier
Summersunshine
Merci
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Verified answer
Bonjour,1) il suffit de développer, tu as le résultat à trouver,
(x-2)² = (a-b)² =a²-2ab+b² = x²-4x+4
(x-3)(x-4) double distributivité vue depuis la 4eme
2) 9998²-9997 * 9996 = (x-2)²-(x-3)(x-4) = 3x-8
avec x = 10 000
(10 000-2)² - (10 000-3)(10 000-4) = 3x-8 = 3*10 000-8 = 29992