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Arrels i factorització (II)

Authored by Lourdes Vidal Casas

Mathematics

4th Grade

Used 17+ times

Arrels i factorització (II)
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Trobeu el valor d'a que fa que x = 1 sigui arrel del polinomi P(x)=x32x2+ax+6P\left(x\right)=x^3-2x^2+ax+6  

5

-3

2

-5

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Quins d'aquests polinomis té només com arrel:{1,-2,0}

(x1)(x+1)(x2)\left(x-1\right)\left(x+1\right)\left(x-2\right)

x(x1)2(x+2)x\left(x-1\right)^2\left(x+2\right)

x(x1)(x2)x\left(x-1\right)\left(x-2\right)

(x2+1)(x2)x2\left(x^2+1\right)\left(x-2\right)x^2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Quina és la factorització del polinomi P(x)=4x3+6x22P\left(x\right)=4x^3+6x^2-2  

 2(x1)(x+2)22\left(x-1\right)\left(x+2\right)^2  

 4(x+1)2(x12)4\left(x+1\right)^2\left(x-\frac{1}{2}\right)  

 4(x1)2(x+12)4\left(x-1\right)^2\left(x+\frac{1}{2}\right)  

 4(x1)(x+1)(x12)4\left(x-1\right)\left(x+1\right)\left(x-\frac{1}{2}\right)  

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Factoritzeu P(x)=x59x3P\left(x\right)=x^5-9x^3  

 P(x)=x2(x+3)(x3)P\left(x\right)=x^2\left(x+3\right)\left(x-3\right)  

 x3(x+3)2x^3\left(x+3\right)^2  

 x3(x3)(x+3)x^3\left(x-3\right)\left(x+3\right)  

 x3(x3)2x^3\left(x-3\right)^2  

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Factoritzeu: 
 P(x)=4x220x+24P\left(x\right)=4x^2-20x+24  

 6(x2)(x+2)6\left(x-2\right)\left(x+2\right)  

 4(x12)(x+12)4\left(x-\frac{1}{2}\right)\left(x+12\right)  

 2(x4)(x+3)2\left(x-4\right)\left(x+3\right)  

 4(x3)(x2)4\left(x-3\right)\left(x-2\right)  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Quin d'aquests valors no pot ser arrel del polinomi P(x)=x63x3+15P\left(x\right)=x^6-3x^3+15  ?

1

-3

6

5

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Quines són les arrels del polinomi P(x)=x52x3+xP\left(x\right)=x^5-2x^3+x  ?

{0,1,-1}

{1,-1,2,-2,3}

{1/2,-1,0,1,2}

{-1,1,2,0}

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