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Liorasarah
@Liorasarah
May 2019
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Bonjour, notre professeur nous a demandé de résoudre cette inéquation en calculant les racines, faire le tableau de signe, puis donner la solution sauf que j'ai du mal :
(2
+ 3)² - (
- 1)² < 0
Je vous remercie d'avance, bonne soirée !
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rosiemuller2000
Verified answer
Coucou
(2x + 3)² - ( x - 1)² < 0
4x² + 12x + 9 -x² +2x -1 < 0
3x² +14x +8 < 0
Δ = 14² -4*3*8 = 100
√Δ = 10
x1 = -4
x2 = -2/3
x l -∞ -4 -2/3 +∞
eq l + 0 - 0 +
donc S= ]-4 ; -2/3[
voila j espere t avoir aider
2 votes
Thanks 1
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Verified answer
Coucou(2x + 3)² - ( x - 1)² < 0
4x² + 12x + 9 -x² +2x -1 < 0
3x² +14x +8 < 0
Δ = 14² -4*3*8 = 100
√Δ = 10
x1 = -4
x2 = -2/3
x l -∞ -4 -2/3 +∞
eq l + 0 - 0 +
donc S= ]-4 ; -2/3[
voila j espere t avoir aider