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Telle11
@Telle11
May 2019
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Bonjour,
On considère l'expression : E= (x-3)² - (x-1)(x-2)
a) Développer et réduire E.
b) Comment peut-on déduire, sans calculatrice, le résultat de : 99 997² - 99 999 x 99 998 ?
Merci.
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99 997 = 10 000 - 3
99 999 = 10 000 - 1
99 998 = 10 000 - 2
Soit x = 10 000
A = (x-3)^2 - (x-1)(x-2)
A = 5x + 11
A = 5*10 000 + 11
A = 50 000 + 11
A = 50 011
Voilà j'espère t'avoir aidé !
:)
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99 997 = 10 000 - 3
99 999 = 10 000 - 1
99 998 = 10 000 - 2
Soit x = 10 000
A = (x-3)^2 - (x-1)(x-2)
A = 5x + 11
A = 5*10 000 + 11
A = 50 000 + 11
A = 50 011
Voilà j'espère t'avoir aidé !
:)