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Polinomios 3º ESO

Authored by David Sierra

Mathematics

9th Grade

Used 8+ times

Polinomios 3º ESO
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

1. Calcula el valor numérico de la expresión algebraica para x = 3

−x24−3x+6-\frac{x^2}{4}-3x+6  

-21

21

212\frac{21}{2}  

−214-\frac{21}{4}  

−34-\frac{3}{4}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. Calcula el valor numérico de la expresión algebraica para z = -3

z3−3z2+6z−3z^3-3z^2+6z-3  

105

-75

-39

-21

-65

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3. ¿Cuál es el resto de la siguiente división?

(x5+4x4−18x3−20x−21):(x2−3)\left(x^5+4x^4-18x^3-20x-21\right):\left(x^2-3\right)  

25x + 15

25x - 21

45x - 36

-65x + 15

-25x + 25

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. Aplica el Teorema del resto para decidir si 3 es una raíz del polinomio x5+4x4−18x3−20x−21x^5+4x^4-18x^3-20x-21  

Sí lo es porque el resto es 1

No lo es porque el resto es 1

Sí lo es porque el resto es 0

No lo es porque el resto es 243

No lo es porque el resto es 3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5. Dados los polinomios A(x)=−x3+3x2−3x+2A\left(x\right)=-x^3+3x^2-3x+2  ; B(x)=2x2−3B\left(x\right)=2x^2-3  ; C(x)=−2x2−5x−4C\left(x\right)=-2x^2-5x-4  

Calcula: 2 A(x) - 3 B(x) - 2 C(x)

−2x3+4x2+4x+21-2x^3+4x^2+4x+21  

−x3+4x2+4x+21-x^3+4x^2+4x+21  

−2x3−4x2+4x+21-2x^3-4x^2+4x+21  

−2x3+4x2−4x+21-2x^3+4x^2-4x+21  

−2x3+4x2+4x+12-2x^3+4x^2+4x+12  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6. Dados los polinomios A(x)=−x3+3x2−3x+2A\left(x\right)=-x^3+3x^2-3x+2  ; B(x)=2x2−3B\left(x\right)=2x^2-3  ; C(x)=−2x2−5x−4C\left(x\right)=-2x^2-5x-4  

Calcula: B(x) ⋅ C(x) − A(x) ⋅ x2B\left(x\right)\ ·\ C\left(x\right)\ -\ A\left(x\right)\ ·\ x^2  

x5−7x4−7x3−4x2+15x+12x^5-7x^4-7x^3-4x^2+15x+12  

−x5−7x4−7x3−4x2+15x+12-x^5-7x^4-7x^3-4x^2+15x+12  

x5+7x4−7x3−4x2+15x+12x^5+7x^4-7x^3-4x^2+15x+12  

x5−7x4+7x3−4x2+15x+12x^5-7x^4+7x^3-4x^2+15x+12  

x5−7x4−7x3−4x2+10x+12x^5-7x^4-7x^3-4x^2+10x+12  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Desarrolla la siguiente identidad notable:

(5x−25)2\left(5x-\frac{2}{5}\right)^2  

25x2−42525x^2-\frac{4}{25}  

25x2+4x+42525x^2+4x+\frac{4}{25}  

25x2−4x+42525x^2-4x+\frac{4}{25}  

25x2−45x+42525x^2-\frac{4}{5}x+\frac{4}{25}  

25x2+42525x^2+\frac{4}{25}  

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