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Soso151001
@Soso151001
May 2019
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Bonjour merci de m'aider à résoudre une équation
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loulakar
Verified answer
Bonjour,
(x + 7)^2 = 3
x^2 + 14x + 49 = 3
x^2 + 14x + 49 - 3 = 0
x^2 + 14x + 46 = 0
Delta = 14^2 - 4 * 1 * 46
Delta = 196 - 184
Delta = 12
Vdelta = V12 = 2V3 > 0 donc deux solutions possibles
X1 = (-14 - 2V3)/2 = -7 - V3
X2 = (-14 + 2V3)/2 = -7 + V3
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Verified answer
Bonjour,(x + 7)^2 = 3
x^2 + 14x + 49 = 3
x^2 + 14x + 49 - 3 = 0
x^2 + 14x + 46 = 0
Delta = 14^2 - 4 * 1 * 46
Delta = 196 - 184
Delta = 12
Vdelta = V12 = 2V3 > 0 donc deux solutions possibles
X1 = (-14 - 2V3)/2 = -7 - V3
X2 = (-14 + 2V3)/2 = -7 + V3