comment réaliser ses calcule sil vous plait ???
a. (x + 1)2 = 9
b. x2 + 1 = 9

By: USER6524
27 Agustus 2025 mathematiques 5 minutes
4.5
90 views 90 comments 13 shares
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Question

Grade: Education Subject: mathematiques
comment réaliser ses calcule sil vous plait ???
a. (x + 1)2 = 9
b. x2 + 1 = 9
Asked by:
90 Viewed 90 Answers

Answer (90)

Best Answer
(456)
a.
(x + 1)² - 9 =0
((x+1) + 3))  ((x+1) - 3)) =0
(x+4)  (x-2) =0
(x+4)=0           ou         (x-2) =0
   x=-4            ou         x= 2


b.
x² + 1 = 9
x² = 9 - 1
x² = 8
x= V8      x= -V8              (V : racine carée)
x= 2V2      x= -2V2


Answered on 27 Agustus 2025
(101)
(x+1)2=9
x+1=4, 5
x=3, 5
(3, 5+1)2=9

2x+1=9
2x=8
x=4
4x2+1=9
Answered on 27 Agustus 2025

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