
Equação do 2º Grau
Mathematics
9th Grade
10 Questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Representa uma Equação do 2º Grau:
2x - 1 = 17
x² - 5x + 6
2x + x² - 8 = x²
x² - 4x + 3 = 0
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A representação de uma Equação do 2º Grau completa é dada por:
ax + b = 0
ax² + bx = 0
ax² + bx + c = 0
ax² + c = 0
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A Fórmula Resolutiva de uma Equação do 2º Grau é dada por:
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
São raízes da equação do 2º grau:
x² - 5x + 6 = 0
2 e -3
-2 e 3
2 e 3
-2 e -3
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
O par de opostos 2 e -2 são raízes da equação quadrática:
x² + 4 = 0
x² - 4 = 0
x² + 4x - 4 = 0
x² - 4x + 4 = 0
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Conhecendo o discriminante (delta) da equação
x² + 2x - 15 = 0
Podemos afirmar que essa equação possui:
Duas raízes reais e diferentes
Uma raiz real
Não possui raízes reais
Possui três raízes reais
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A soma das raízes da equação do 2º grau
x² - 2x - 8 = 0 é:
-2
2
-8
8
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