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Examen de Algebra 4_ 2020
1. Resolver: Ejercicio 141, p31
(3 −
𝑥
2
) − (1 −
𝑥
3
) = 7 − (𝑥 −
𝑥
2
)
2. Resolver la siguiente ecuación: Ejercicio 268, p17
4𝑥2
𝑥−1
−
1−3𝑥
4
=
20𝑥
3
3. Resolver el siguiente sistema:
{
𝑥 − 1
2
−
𝑦 − 1
3
= −
13
36
𝑥 + 1
3
−
𝑦 + 1
2
= −
2
3
4. Simplificar: Ejercicio 130, p26
2
2𝑥2 + 5𝑥 + 3
−
1
2𝑥2 − 𝑥 − 6
+
3
𝑥2 − 𝑥 − 2
5. Dividir: Ejercicio 55, p27
−𝑚7
+ 5𝑚6
𝑛 − 14𝑚5
𝑛2
+ 20𝑚4
𝑛3
− 13𝑚3
𝑛4
− 9𝑚2
𝑛5
+ 20𝑚𝑛6
− 4𝑛7
𝑒𝑛𝑡𝑟𝑒 𝑛3
+ 3𝑚2
𝑛 − 5𝑚𝑛2
− 𝑚3
6. Ejercicio 87, p3
Un padre plantea 16 problemas a su hijo con la condición de que por cada problema que resuelva el muchacho
recibirá $12 y por cada problema que no resuelva perderá $5. Después de trabajar en los problemas, el
muchacho recibe $73 ¿Cuántos problemas resolvió y cuantos no?
7. Ejercicio 194, p1
Cinco trajes y 3 corbatas cuestan $4, 180, y 8 trajes y 9 corbatas $6,940. Hallar el precio de un traje y de una
corbata.
8. Factorizar: Ejercicio 103, p35
8𝑥6
+ 729
9. Resolver: Ejercicio 141, p12
5𝑥
4
−
3
17
(𝑥 − 20) − (2𝑥 − 1) =
𝑥 + 24
34
10. Resolver la siguiente ecuación: Ejercicio 268, p19
𝑥 − 1
𝑥 + 1
+
𝑥 + 1
𝑥 − 1
=
2𝑥 + 9
𝑥 + 3
11. Factorizar: Ejercicio 101, p20
30𝑥10
− 91𝑥5
− 30
Solución 1: 𝑥 = 15
Solución 2: 𝑥1 = −
1
23
, 𝑥2 = 3
Solución 3: 𝑥 =
1
2
, 𝑦 =
4
3
Solución 4:
7𝑥+4
(2𝑥+3)(𝑥+1)(𝑥−2)
Solución 5: 𝑚4
− 2𝑚3
𝑛 + 3𝑚2
𝑛2
− 4𝑛4
Solución 6: Resolvió 9 y no resueltos 7
Solución 7: Traje $800, corbata $60.
Solución 8: (2𝑥2
+ 9)(4𝑥4
− 18𝑥2
+ 81)
Solución 9: 𝑥 = 4
Solución 10: 𝑥1 = 3, 𝑥2 = −1
2
3
Solución 11: (3𝑥5
− 10)(10𝑥5
+ 3)

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Examen de algebra 4

  • 1. Examen de Algebra 4_ 2020 1. Resolver: Ejercicio 141, p31 (3 − 𝑥 2 ) − (1 − 𝑥 3 ) = 7 − (𝑥 − 𝑥 2 ) 2. Resolver la siguiente ecuación: Ejercicio 268, p17 4𝑥2 𝑥−1 − 1−3𝑥 4 = 20𝑥 3 3. Resolver el siguiente sistema: { 𝑥 − 1 2 − 𝑦 − 1 3 = − 13 36 𝑥 + 1 3 − 𝑦 + 1 2 = − 2 3 4. Simplificar: Ejercicio 130, p26 2 2𝑥2 + 5𝑥 + 3 − 1 2𝑥2 − 𝑥 − 6 + 3 𝑥2 − 𝑥 − 2 5. Dividir: Ejercicio 55, p27 −𝑚7 + 5𝑚6 𝑛 − 14𝑚5 𝑛2 + 20𝑚4 𝑛3 − 13𝑚3 𝑛4 − 9𝑚2 𝑛5 + 20𝑚𝑛6 − 4𝑛7 𝑒𝑛𝑡𝑟𝑒 𝑛3 + 3𝑚2 𝑛 − 5𝑚𝑛2 − 𝑚3 6. Ejercicio 87, p3 Un padre plantea 16 problemas a su hijo con la condición de que por cada problema que resuelva el muchacho recibirá $12 y por cada problema que no resuelva perderá $5. Después de trabajar en los problemas, el muchacho recibe $73 ¿Cuántos problemas resolvió y cuantos no? 7. Ejercicio 194, p1 Cinco trajes y 3 corbatas cuestan $4, 180, y 8 trajes y 9 corbatas $6,940. Hallar el precio de un traje y de una corbata. 8. Factorizar: Ejercicio 103, p35 8𝑥6 + 729 9. Resolver: Ejercicio 141, p12 5𝑥 4 − 3 17 (𝑥 − 20) − (2𝑥 − 1) = 𝑥 + 24 34 10. Resolver la siguiente ecuación: Ejercicio 268, p19 𝑥 − 1 𝑥 + 1 + 𝑥 + 1 𝑥 − 1 = 2𝑥 + 9 𝑥 + 3 11. Factorizar: Ejercicio 101, p20 30𝑥10 − 91𝑥5 − 30
  • 2. Solución 1: 𝑥 = 15 Solución 2: 𝑥1 = − 1 23 , 𝑥2 = 3 Solución 3: 𝑥 = 1 2 , 𝑦 = 4 3 Solución 4: 7𝑥+4 (2𝑥+3)(𝑥+1)(𝑥−2) Solución 5: 𝑚4 − 2𝑚3 𝑛 + 3𝑚2 𝑛2 − 4𝑛4 Solución 6: Resolvió 9 y no resueltos 7 Solución 7: Traje $800, corbata $60. Solución 8: (2𝑥2 + 9)(4𝑥4 − 18𝑥2 + 81) Solución 9: 𝑥 = 4 Solución 10: 𝑥1 = 3, 𝑥2 = −1 2 3 Solución 11: (3𝑥5 − 10)(10𝑥5 + 3)