
TRABALHO_2°TRIM_9°ANOS_2024_EQUAÇÃO DO 2° GRAU
Authored by cleber junior
Mathematics
9th Grade
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16 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Observe as seguintes equações do 2º grau e assinale a(s) incompletas:
I) 3x² – 7x = 0
II) 9x² – 12x + 21 = 0
III) -2x2 + 5 = 0
Apenas III
Apenas II e III
Apenas I e II
Apenas I e III
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identifique os coeficientes da equação e se ela é completa ou não: x² - 10x + 25 = 0
a = 1; b = 10 e c = 25 completa
a = 10; b = 1 e c = 25 completa
a = 1; b = -10 e c = 25 completa
a = 1; b = -10 e c = 25 incompleta
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Quais os coeficientes da equação x² – 7 = 0 ?
a = 0, b = - 7 e c = 0
a = 1, b = 0 e c = 7
a = 1, b = 0 e c = - 7
a = 1, b = 7 e c = 0
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A partir dos coeficiente a, b e c, determine a equação do 2°grau, em que: a = 2, b= 3, c = 0.
2x2 + 3X +9 =0
2x2 + 3X =0
x2 + 3 =0
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
É correto afirmar que:
Em uma equação do 2º grau o coeficiente a pode ser zero.
Em uma equação do 2º grau o coeficiente a não pode ser zero.
Em uma equação do 2º grau o coeficiente b não pode ser zero.
Em uma equação do 2º grau o coeficiente c não pode ser zero.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual o valor da soma dos coeficiente a e c na equação: 2x² + 4x - 6 = 0
-4
4
0
6
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual o valor da soma dos coeficiente a e b na equação: - x² - 5x + 2= 0
6
- 4
- 6
4
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