comment resoudre cette equation (3x+7)au carré=(7x-10)au carre
Mathématiques
linaaa
Question
comment resoudre cette equation (3x+7)au carré=(7x-10)au carre
1 Réponse
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1. Réponse Anonyme
(3x + 7)² = (7x - 10)²
(3x + 7)² - (7x - 10)² = 0
3x + 7 = 7x - 10
7 + 10 = 7x - 3x
17 = 4x
17/4 = x
3x + 7 = -(7x - 10)
3x + 7 + 7x - 10 = 0
10x = 3
x = 3/10
S= {3/10 ; 17/4}