
9º ano matemática 2ª etapa 2023
Authored by Lobão Alexandrino
Mathematics
9th Grade
Used 4+ times

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22 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine os coeficientes (a,b ec) da equação X2 + X+ 2= 0
A = 1 B= 1 C= 2
A = -1 B= 2 C= 1
A = 2 B= 1 C= 1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A partir dos coeficiente A, B e C, determine a equação do 2°grau, em que: A= 1, B=0, C = -2 .
X2 -2 =0
X2 + X -2 =0
X2 + 2 =0
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A equação da imagem é:
Equação do 2°grau completa.
Equação do 2° grau incompleta.
Equação do 1° grau completa.
Equação do 1°grau incompleta,
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Quais das equações do 2º grau a seguir, são incompletas? (forma reduzida)
x² - 7x + 10 = 0
4x² - 4x + 1 = 0
– x² – 7x = 0
x² - 16 = 0
x² + 2x + 7= 2x + 7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
As raízes da equação 2x² - 40 = x² + 9, são:
7 e 7
7 e -7
-7 e -7
14 e 7
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
As raízes da equação x² - 8x + 15 = 0, são:
3 e 5
-3 e 5
3 e -5
-3 e -5
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A equação que representa a área do retângulo é:
4x² = 256
4x = 256
5x = 256
4x² + 256 = 0
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