
Desvendando Equações Quadráticas
Mathematics
10th Grade
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Considere a equação <katex latex="2x^2 - 4x + 1 = 0"></katex>. Qual é o valor do coeficiente <katex latex="a"></katex>?
<katex latex="-4"></katex>
<katex latex="2"></katex>
<katex latex="1"></katex>
<katex latex="-2"></katex>
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Na equação <katex latex="x^2 + 6x + 9 = 0"></katex>, qual é o valor do discriminante (<katex latex="\Delta"></katex>)?
<katex latex="0"></katex>
<katex latex="9"></katex>
<katex latex="36"></katex>
<katex latex="81"></katex>
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das seguintes equações é uma equação do segundo grau?
<katex latex="x + 5 = 0"></katex>
<katex latex="x^2 - 3x + 2 = 0"></katex>
<katex latex="2x^3 - x = 0"></katex>
<katex latex="4x = 8"></katex>
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dada a equação <katex latex="3x^2 + 2x - 1 = 0"></katex>, qual é o valor do coeficiente <katex latex="b"></katex>?
<katex latex="3"></katex>
<katex latex="2"></katex>
<katex latex="-1"></katex>
<katex latex="1"></katex>
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a fórmula de Bhaskara para encontrar as raízes de uma equação do segundo grau <katex latex="ax^2 + bx + c = 0"></katex>?
<katex latex="x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}"></katex>
<katex latex="x = \frac{-b}{a}"></katex>
<katex latex="x = \frac{b^2 - 4ac}{2a}"></katex>
<katex latex="x = \frac{-c}{b}"></katex>
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se o discriminante (<katex latex="\Delta"></katex>) de uma equação do segundo grau é negativo, o que podemos afirmar sobre as raízes?
São duas raízes reais e distintas
São duas raízes reais e iguais
Não existem raízes reais
Existe apenas uma raiz real
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolva a equação <katex latex="x^2 - 5x + 6 = 0"></katex>. Qual das alternativas apresenta as raízes corretas?
<katex latex="x = 2"></katex> e <katex latex="x = 3"></katex>
<katex latex="x = -2"></katex> e <katex latex="x = -3"></katex>
<katex latex="x = 1"></katex> e <katex latex="x = 6"></katex>
<katex latex="x = -1"></katex> e <katex latex="x = -6"></katex>
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