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ChoiDudaPark
@ChoiDudaPark
November 2019
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Um aluno resolveu corretamente a equação do 2° grau x² -3x + 2 = 0 e encontrou as raízes. Nessas condições, as soluções da equação são:
A) -3 e -1
B) -2 e 1
C) -1 e 3
D) 1 e 2
E) 1 3 -3
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BrenoRS
Verified answer
X²-3x+2=0
Utilizando Bhaskara temos:
[-(-3)+ou-√(-3)²-8]/2
[3+ou-√1]/2
x'=(3+1)/2=2
x"=(3-1)/2=1
D
1 votes
Thanks 3
jjzejunio
Verified answer
Eaew!!!
X² - 3x + 2 = 0
a = 1
b = -3
c = 2
∆ = (-3)² - 4.1.2
∆ = 9 - 8
∆ = 1
X = -(-3) ± √1/2.1
X = 3 ± 1/2
X' = 3 + 1/2 = 4/2 = 2
X" = 3 - 1/2 = 2/2 = 1
S={ 2, 1 }
Alternativa D)
1 votes
Thanks 2
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Lista de comentários
Verified answer
X²-3x+2=0Utilizando Bhaskara temos:
[-(-3)+ou-√(-3)²-8]/2
[3+ou-√1]/2
x'=(3+1)/2=2
x"=(3-1)/2=1
D
Verified answer
Eaew!!!X² - 3x + 2 = 0
a = 1
b = -3
c = 2
∆ = (-3)² - 4.1.2
∆ = 9 - 8
∆ = 1
X = -(-3) ± √1/2.1
X = 3 ± 1/2
X' = 3 + 1/2 = 4/2 = 2
X" = 3 - 1/2 = 2/2 = 1
S={ 2, 1 }
Alternativa D)