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Quiz de Álgebra 9°

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10 preguntas de álgebra nivel 9°

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Colombia

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Quiz de Álgebra 9°
 

Quiz de Álgebra 9°Online version

10 preguntas de álgebra nivel 9°

by HIMMLEIDY _ IBARGUEN IBARGUEN
1

Resolver: 2x + 5 = 17, ¿cuál es x?

2

Factoriza: x^2 - 9.

3

Sistema de ecuaciones: 2x + y = 5; x - y = 1. Solución:

4

Propiedad distributiva: simplifica 3(2a+5).

5

Resuelve 4x - 7 = 0.

6

Si 2x - 3 = x + 4, ¿valor de x?

7

Factoriza por diferencia de cuadrados: x^2 - 16.

8

Proporción: 3/4 = x/8. ¿x?

9

Si y = 2x + 1, ¿y cuando x = 3?

10

Completa: (a+3)(a+2) = a^2 + ?a + 6

Explicación

Al restar 5 a ambos lados se obtiene 2x = 12, x = 6.

Es una diferencia de cuadrados: (a^2 - b^2) = (a-b)(a+b).

Sumando las ecuaciones se obtiene 3x = 6 y luego x = 2; reemplazando, y = 1.

Aplicación de la distributiva: 3(2a) + 3(5) = 6a + 15.

Isolamos x: 4x = 7, x = 7/4.

Restando x a ambos lados: x - 3 = 4, luego x = 7.

x^2 - 16 es igual a (x-4)(x+4) = difference of squares.

cruzando: 3·8 = 4x => x = 24/4 = 6.

Y = 2(3) + 1 = 6 + 1 = 7.

Producto: a^2 + 2a + 3a + 6 = a^2 + 5a + 6.

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