(4x+12)²=(7x-15)² resudre l equation svp
Mathématiques
sturzaion10
Question
(4x+12)²=(7x-15)² resudre l equation svp
1 Réponse
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1. Réponse Terminator426
Bonjour,
(4x+12)²=(7x-15)²
⇒ (4x+12)² - (7x-15)² = 0
⇒ [(4x+12)+(7x-15)][(4x+12)-(7x-15)] = 0
⇒ (11x-3)(27-3x) = 0
⇒ 11x-3=0 ou 27-3x=0
⇒ 11x = 3 ou 3x = 27
⇒ x = 3/11 ou x = 27/3 = 9