
Equações do segundo grau
Authored by Marta Morais
Mathematics
9th Grade
CCSS covered
Used 27K+ times

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16 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quais os coeficientes?
a = 6
b = 2
c = 1
a=9
b= - 6
c = 1
a= 9
b= 6
c= 1
a= 2
b= 6
c= 1
2.
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
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Classifique as afirmações em V (verdadeira) ou F (falsa)
I. Se o discriminante da equação é igual a zero, ela tem duas raízes reais e iguais. ( )
II. Se o discriminante da equação é menor que zero, ela tem duas raízes reais diferentes. ( )
III. Se o discriminante da equação é maior que zero, ela tem duas raízes reais e diferentes. ( )
IV. Se o discriminante da equação é igual a zero, ela não tem raízes reais. ( )
V - V - V - F
V - F - V - F
V - V - F - F
F - V - F - V
Tags
CCSS.HSA-REI.B.4B
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A equação do segundo grau que possui os coeficientes a = 5, b = -1 e c = 0 é:
-x² + 5x = 0
5x² -1 =0
5x² - x = 0
-x² + 5 =0
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um campo basquetebol tem área igual a 240 m². Podemos equacionar esta situação como:
x² + 8x =0
x² + 8x = 240
2x + 8x = 240
2x+8x = 0
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das equações abaixo é do segundo grau?
x² + 3x - 1 = x² + 10
0x² + 4x – 3 = 0
x + x + 6 = 0
x · (x - 5) = 0
2x³ - 8x² - 2 = 0
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A equação que representa a área do retângulo é:
4x² = 256
4x = 256
5x = 256
4x² + 256 = 0
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