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HelpMesvp123
@HelpMesvp123
May 2019
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Besoin d'aide urgent. Merci à celle ou celui qui m'aidera.
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Verified answer
Bonjour,
9x²+12x+4 = (3x+2)²
3x+2 = 0
3x =-2
x =
-2/3
antécédent de 0 par la fonction f(x) = -2/3
1 votes
Thanks 1
PAU64
On cherche x tel que f (x) = 0
9x² + 12x + 4 = 0
(3x + 2)² = 0 (<--
forme factorisée
)
3x + 2 = 0
3x = - 2
x = - 2/3
- 2/3 est un antécédent de 0 par la fonction f.
1 votes
Thanks 1
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Verified answer
Bonjour,9x²+12x+4 = (3x+2)²
3x+2 = 0
3x =-2
x =-2/3
antécédent de 0 par la fonction f(x) = -2/3
9x² + 12x + 4 = 0
(3x + 2)² = 0 (<-- forme factorisée)
3x + 2 = 0
3x = - 2
x = - 2/3
- 2/3 est un antécédent de 0 par la fonction f.