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Allvaromatos
@Allvaromatos
December 2019
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Resolva essa equação modular, com as contas.
|x2-4x+5|=2
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albertrieben
Bom dia Allvaro
|x² - 4x + 5| = 2
x² - 4x + 3 = 0
delta
d² = 16 - 12 = 4
d = 2
x = (4 + 2)/2 = 6/2 = 3
x = (4 - 2)/2 = 2/2 = 1
|x² - 4x + 5| = -2
x² - 4x + 7 = 0
delta
d² = 16 - 28 = -8
não tem outras raizes
S = (1,3)
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|x² - 4x + 5| = 2
x² - 4x + 3 = 0
delta
d² = 16 - 12 = 4
d = 2
x = (4 + 2)/2 = 6/2 = 3
x = (4 - 2)/2 = 2/2 = 1
|x² - 4x + 5| = -2
x² - 4x + 7 = 0
delta
d² = 16 - 28 = -8
não tem outras raizes
S = (1,3)