Ortega Frank
07/01/2023 · High School
Realiza les siguientes divisionex. \( 237 \cdot\left(12 x^{3}-2 x^{2}-3 x+28\right)+(2 x+4) \) \( 278 .\left(8 x^{3}-5 x^{2}+x\right)+(2 x-1) \) \( \frac{2}{2}\left(\frac{2}{3}-\frac{1}{5} x^{2}-\frac{1}{4} x-2\right)-\left(x^{2}+x+1\right) \)
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Step-by-step Solution
Vamos a realizar las operaciones que has solicitado una por una.
### 1. \( 237 \cdot (12x^3 - 2x^2 - 3x + 28) + (2x + 4) \)
Primero, multiplicamos \( 237 \) por cada término del polinomio:
\[
237 \cdot 12x^3 = 2844x^3
\]
\[
237 \cdot (-2x^2) = -474x^2
\]
\[
237 \cdot (-3x) = -711x
\]
\[
237 \cdot 28 = 6636
\]
Ahora sumamos el resultado con \( (2x + 4) \):
\[
2844x^3 - 474x^2 - 711x + 6636 + 2x + 4
\]
Combinamos los términos semejantes:
\[
2844x^3 - 474x^2 + (-711x + 2x) + (6636 + 4)
\]
\[
= 2844x^3 - 474x^2 - 709x + 6640
\]
### Resultado:
\[
2844x^3 - 474x^2 - 709x + 6640
\]
---
### 2. \( 278 \cdot (8x^3 - 5x^2 + x) + (2x - 1) \)
Multiplicamos \( 278 \) por cada término del polinomio:
\[
278 \cdot 8x^3 = 2224x^3
\]
\[
278 \cdot (-5x^2) = -1390x^2
\]
\[
278 \cdot x = 278x
\]
Ahora sumamos el resultado con \( (2x - 1) \):
\[
2224x^3 - 1390x^2 + 278x - 1 + 2x
\]
Combinamos los términos semejantes:
\[
2224x^3 - 1390x^2 + (278x + 2x) - 1
\]
\[
= 2224x^3 - 1390x^2 + 280x - 1
\]
### Resultado:
\[
2224x^3 - 1390x^2 + 280x - 1
\]
---
### 3. \( \frac{2}{2}\left(\frac{2}{3} - \frac{1}{5}x^2 - \frac{1}{4}x - 2\right) - (x^2 + x + 1) \)
Primero simplificamos \( \frac{2}{2} = 1 \), así que la expresión se reduce a:
\[
\frac{2}{3} - \frac{1}{5}x^2 - \frac{1}{4}x - 2 - (x^2 + x + 1)
\]
Ahora, distribuimos el signo negativo en \( -(x^2 + x + 1) \):
\[
\frac{2}{3} - \frac{1}{5}x^2 - \frac{1}{4}x - 2 - x^2 - x - 1
\]
Combinamos los términos semejantes. Primero, agrupamos los términos de \( x^2 \), \( x \) y los constantes:
\[
-\frac{1}{5}x^2 - x^2 = -\left(\frac{1}{5} + 1\right)x^2 = -\frac{6}{5}x^2
\]
\[
-\frac{1}{4}x - x = -\left(\frac{1}{4} + 1\right)x = -\frac{5}{4}x
\]
\[
\frac{2}{3} - 2 - 1 = \frac{2}{3} - 3 = \frac{2}{3} - \frac{9}{3} = -\frac{7}{3}
\]
### Resultado:
\[
-\frac{6}{5}x^2 - \frac{5}{4}x - \frac{7}{3}
\]
---
Si necesitas más ayuda o aclaraciones, no dudes en preguntar.
Quick Answer
1. \( 2844x^3 - 474x^2 - 709x + 6640 \)
2. \( 2224x^3 - 1390x^2 + 280x - 1 \)
3. \( -\frac{6}{5}x^2 - \frac{5}{4}x - \frac{7}{3} \)
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