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Mano71
@Mano71
January 2020
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Alguém pra me ajudar nessa???
Calcule a e b, de modo que o polinômios sejam identicos P(x)=(2a+6 )x³+(3b-4)x² e Q(x)=2x³+ 5x² obtemos
A) - 2 e 5
B) - 2 e 3
C) 3 e -4
D) 1 e 2
E) 2 e 3
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gabrieljud18
(2a + 6)x^3 + (3b - 4)x^2 = (2)x^3 + (5)x^2
(2a + 6) = (2) E (3b - 4) = (5)
2a = 2 - 6 3b = 5 + 4
2a = -4 3b = 9
a = -4/2 b = 9/3
a = -2 b = 3
RESPOSTA: B
1 votes
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(2a + 6) = (2) E (3b - 4) = (5)
2a = 2 - 6 3b = 5 + 4
2a = -4 3b = 9
a = -4/2 b = 9/3
a = -2 b = 3
RESPOSTA: B