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Zarate11
@Zarate11
April 2019
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L'expression factorisée de x² -16
A=n'existe pas ?
B=(x-4)(x+4)?
C=(x-4)²?
Justifier. merci pour l'aide !
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nonotata
Identitie remarquable
(a-b)(a+b) = a² -b²
donc la bonne response est la b
il te suffit de la developper
(x-4)(x+4)
= x² +4x-4x-16
= x²-16
0 votes
Thanks 1
nathalienouts
Identité remarquable a²-b² = (a+b)(a-b)
B est la solution
(x-4)(x+4)
= x²+4x-4x-16
= x²-16
0 votes
Thanks 1
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(a-b)(a+b) = a² -b²
donc la bonne response est la b
il te suffit de la developper
(x-4)(x+4)
= x² +4x-4x-16
= x²-16
B est la solution
(x-4)(x+4)
= x²+4x-4x-16
= x²-16