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JosianeCamila
@JosianeCamila
December 2019
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X² - 2x - 3 < 0
Por favor!!! Qual o resultado, com calculo!
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cledson2017
X
=-b
+-
√(-b)²-4.a.c
2. a
x=-(-2)+-√(-2)²-4.1.(-3)
2.1
x= 2+-√4+12
2
x= 2+-√16
2
x= 2+-4
2
X´=2+4=6 ⇒ x´=3 x´´=2-4=-2 ⇒ x´´= - 1
2 2 2 2
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Lista de comentários
2. a
x=-(-2)+-√(-2)²-4.1.(-3)
2.1
x= 2+-√4+12
2
x= 2+-√16
2
x= 2+-4
2
X´=2+4=6 ⇒ x´=3 x´´=2-4=-2 ⇒ x´´= - 1
2 2 2 2