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Latufsaidina
@Latufsaidina
April 2019
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C pour dem1 faite votr possibl svp é mer6 d'avance :)
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pan59
-x² + 6x - 7
delta=b²-4ac = 8
x1 = 8,0
x2 = 2,8
Ces valeurs annulent le bénéfice.
(x-1)² - 9 est de la forme a²-b²
Soit: (x-1+3)(x-1-3) = (x+2)(x-4)
= x² - 2x - 8
delta = 36
x1 = 4
x2 = -2
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delta=b²-4ac = 8
x1 = 8,0
x2 = 2,8
Ces valeurs annulent le bénéfice.
(x-1)² - 9 est de la forme a²-b²
Soit: (x-1+3)(x-1-3) = (x+2)(x-4)
= x² - 2x - 8
delta = 36
x1 = 4
x2 = -2