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Matemática 4to año
Ecuaciones cuadráticas o de segundo grado completas
¡¡Continuamos con las ecuaciones de segundo grado!!
Las ecuaciones completas de segundo grado tienen la forma:
Y se pueden resolver con la fórmula, denominada resolvente o
de BHASKARA
Esta fórmula nos permite hallar los valores de x, para el cual la
ecuación es igual a cero. Y a estos valores se los denomina raíces.
Ejemplo: 𝟐𝒙𝟐
+ 𝟑𝒙 + 𝟏 = 𝟎
Coeficientes: 𝑎 = 2 𝑏 = 3 𝑐 = 1
Reemplazamos los valores de a, b y c, por nuestros coeficientes
A continuación, verificamos que para 𝒙𝟏 = −𝟏 𝒚 𝒙𝟐 = −
𝟏
𝟐
la ecuación da cero.
Si 𝐱𝟏 = −𝟏 𝐱𝟐 = − 𝟏/𝟐
2 ⋅ (−1)2
+ 3 ⋅ (−1) + 1 = 0 2 ⋅ (−1/2)2
+ 3 ⋅ (−1/2) + 1 = 0
2 ⋅ 1 − 3 + 1 = 0 2 ⋅ 1/4 − 3/2 + 1 = 0
2 − 3 + 1 = 0 1/2 − 3/2 + 1 = 0
0 = 0 0 = 0
¡¡¡Ahora te toca a vos!!!
Recuerda:
Siempre lee la teoría y analiza los ejemplos antes de empezar, si no entendes y/o no podés
participar de las clases de zoom, no te quedes sin contárnoslo. Juntos buscaremos la mejor forma
para que accedas a una explicación.
También podes ingresar a este link, que tiene una explicación muy precisa
https://www.youtube.com/watch?v=ZC67c5ar9mA
Si vas a entregar los trabajos fuera de la fecha de entrega, avísanos y lo tenemos en cuenta.
Cuando subas el archivo a classroom o lo envíes por mail, que sea en posición vertical, no horizontal.
Cariños para ustedes.
Las profes Adriana y Sandra.
Hallar las soluciones de las siguientes ecuaciones cuadráticas, y verificar los resultados obtenidos cuando sea
posible.
a) 𝑥2
+ 𝑥 − 6 = 0
b) 𝑥2
− 2𝑥 − 3 = 0
c) 2𝑥2
− 3𝑥 + 4 = 0
d) 3𝑥2
+ 2𝑥 = 0
e) 𝑥2
− 4𝑥 + 4 = 0
f) 3𝑥2
+ 10𝑥 − 3 = 0
g) -2𝑥2
+ 2𝑥 + 4 = 0

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4to año ecuaciones cuadraticas c.

  • 1. Matemática 4to año Ecuaciones cuadráticas o de segundo grado completas ¡¡Continuamos con las ecuaciones de segundo grado!! Las ecuaciones completas de segundo grado tienen la forma: Y se pueden resolver con la fórmula, denominada resolvente o de BHASKARA Esta fórmula nos permite hallar los valores de x, para el cual la ecuación es igual a cero. Y a estos valores se los denomina raíces. Ejemplo: 𝟐𝒙𝟐 + 𝟑𝒙 + 𝟏 = 𝟎 Coeficientes: 𝑎 = 2 𝑏 = 3 𝑐 = 1 Reemplazamos los valores de a, b y c, por nuestros coeficientes A continuación, verificamos que para 𝒙𝟏 = −𝟏 𝒚 𝒙𝟐 = − 𝟏 𝟐 la ecuación da cero. Si 𝐱𝟏 = −𝟏 𝐱𝟐 = − 𝟏/𝟐 2 ⋅ (−1)2 + 3 ⋅ (−1) + 1 = 0 2 ⋅ (−1/2)2 + 3 ⋅ (−1/2) + 1 = 0 2 ⋅ 1 − 3 + 1 = 0 2 ⋅ 1/4 − 3/2 + 1 = 0 2 − 3 + 1 = 0 1/2 − 3/2 + 1 = 0 0 = 0 0 = 0
  • 2. ¡¡¡Ahora te toca a vos!!! Recuerda: Siempre lee la teoría y analiza los ejemplos antes de empezar, si no entendes y/o no podés participar de las clases de zoom, no te quedes sin contárnoslo. Juntos buscaremos la mejor forma para que accedas a una explicación. También podes ingresar a este link, que tiene una explicación muy precisa https://www.youtube.com/watch?v=ZC67c5ar9mA Si vas a entregar los trabajos fuera de la fecha de entrega, avísanos y lo tenemos en cuenta. Cuando subas el archivo a classroom o lo envíes por mail, que sea en posición vertical, no horizontal. Cariños para ustedes. Las profes Adriana y Sandra. Hallar las soluciones de las siguientes ecuaciones cuadráticas, y verificar los resultados obtenidos cuando sea posible. a) 𝑥2 + 𝑥 − 6 = 0 b) 𝑥2 − 2𝑥 − 3 = 0 c) 2𝑥2 − 3𝑥 + 4 = 0 d) 3𝑥2 + 2𝑥 = 0 e) 𝑥2 − 4𝑥 + 4 = 0 f) 3𝑥2 + 10𝑥 − 3 = 0 g) -2𝑥2 + 2𝑥 + 4 = 0