Equações do segundo grau
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
+2
Standards-aligned
Alexandra Carvalho
Used 37+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 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
Tags
CCSS.HSA.APR.A.1
CCSS.HSA.REI.B.4
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
45 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.4
4.
MULTIPLE CHOICE QUESTION
20 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
1 min • 1 pt
Uma quadra de basquete tem área igual a 240 m². Podemos representar sua área multiplicando a medida da largura pela medida do comprimento. Obtemos dessa multiplicação a equação:
x² + 8x =0
x² + 8x = 240
2x + 8x = 240
2x+8x = 0
6.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
Marque os números que são solução da equação x² - x -30 = 0
-6
-5
1
5
7.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
As raízes da equação - x² - 8x + 9 = 0 são:
0
-1
-8
-9
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