SE LIGA 9 ANO - 2 TRIMESTRE
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Used 7+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Das alternativas a seguir, marque aquela que corresponde a uma equação do 2º grau incompleta.
3x² + 4 > 2
2x – 3 + 4x² = 0
3x² + 4x = -1
3x² + 3 = 0
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Qual das equações abaixo, não representa uma equação do 2º grau?
2x + x = 7²
3x² + 8x = 0
7 = - x²
t² - 2t = 1
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Os coeficientes a, b e c, da equação x² - 4x – 15 = 0, são respectivamente:
1, -4, -15
0, 4, -15
-1, +4, 15
-2, 15, -4
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Utilizando a fórmula resolutiva (Báskara), determine a soma das raízes da equação x² - 10x – 56 = 0.
18
12
10
-4
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A respeito das raízes da equação x² - 4x - 5=0 é correto afirmar:
A equação tem duas raízes reais diferentes.
A equação não tem raízes reais.
A equação tem uma única raiz real.
Nada podemos afirmar a respeito das raízes da equação.
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Qual é o valor do Δ da equação x² - 6x + 9 = 0?
-9
36
9
0
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Qual das alternativas a seguir representa uma equação do 2º grau completa?
2x + 3 = 0
x² - 9 = 0
3x² - 2x + 1 = 0
4x² + 5x = 0
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