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Quiz: Valorizar expresiones algebraicas

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Quiz: Valorizar expresiones algebraicas

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Evaluación de expresiones algebraicas

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Bernardo Miranda Donoso
Bernardo Miranda Donoso
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Quiz: Valorizar expresiones algebraicas
 

Quiz: Valorizar expresiones algebraicasOnline version

Evaluación de expresiones algebraicas

by Bernardo Miranda Donoso
1

Valoriza 3x^2 + 2x - 5, con x=4. ¿Cuál es el resultado?

2

Evalúa 2a - b^2 con a=3, b=2. ¿Resultado?

3

Simplifica 5x - 3x + 2y y valora x=1, y=1. ¿Cuánto da?

4

Evalúa (x+4)(x-1) con x=3. ¿Resultado?

5

Valoriza 4x^2 - x con x=5. ¿Valor?

6

Evalúa 3(y-2) + x con x=4, y=5. ¿Resultado?

7

Si la expresión 2x + 3y se evalúa con x=2, y=-1, ¿cuál es el valor?

8

Evalúa x^2 - 4 con x= -3. ¿Resultado?

9

Valoriza 7 - 2x con x= -2. ¿Cuánto da?

10

Evalúa (x+2)^2 con x=3. ¿Resultado?

Explicación

Al sustituir x=4: 3(16)+8-5 = 48+8-5 = 51.

2·3 - 2^2 = 6 - 4 = 2.

La expresión se simplifica a 2x + 2y; con x=1,y=1 es 2+2=4.

(3+4)(3-1) = 7·2 = 14.

4·25 - 5 = 100 - 5 = 95.

3(5-2) + 4 = 9 + 4 = 13.

2·2 + 3(−1) = 4 − 3 = 1.

(−3)^2 - 4 = 9 - 4 = 5.

7 - 2(−2) = 7 + 4 = 11.

(3+2)^2 = 5^2 = 25.

 
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