propagation h=(5b+3)² -(5b-3)² factorisation m=16b² -24b +9 n=(5b-3)²-(3-5b)(7b-2)
Mathématiques
mouadox
Question
propagation h=(5b+3)² -(5b-3)²
factorisation m=16b² -24b +9
n=(5b-3)²-(3-5b)(7b-2)
factorisation m=16b² -24b +9
n=(5b-3)²-(3-5b)(7b-2)
1 Réponse
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1. Réponse choupp
Ta factorisation est fausse :
(5b +3)² - (5b -3)²
= (5b +3 - 5b +3)(5b +3 + 5b -3)
= 6(10b)