9º Ano - Aula 55 - 2º Trimestre
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•
Mathematics
•
9th Grade
•
Hard
ADOLAR SCHMIDT
Used 10+ times
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5 Slides • 0 Questions
1
9º Ano - Aula 55
Equação do 2º Grau
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Objetivo da Aula
Identificar uma equação do 2º Grau.
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Definição
Uma equação é uma sentença matemática que possui uma incógnita e uma igualdade.
Uma equação do 2º grau com uma variável tem a forma:
ax² + bx + c = 0 ---> (onde a é diferente de 0 zero)
Sendo:
x a Incógnita,
a,b e c números reais, chamados coeficientes.
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Exemplos:
1) x² - 7x + 10 = 0 ; onde a=1, b=-7 e c=10.
2) 5x² - x - 3 = 0 ; onde a=5, b=-1 e c=-3.
3) 8x² - 4x = 0 ; onde a=8, b=-4 e c=0.
4) -3x² + 2 = 0 ; onde a=-3, b=0 e c=2.
5) 9x² = 0; onde a=9, b=0 e c=0.
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Observe que:
a representa o coeficiente de x²
b representa o coeficiente de x
c representa o termo indepemdente
9º Ano - Aula 55
Equação do 2º Grau
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