Quiz about Repasamos lo visto (polinomios) 3º D (7 febrero)

Question 1

Calcula $$P\left(x\right)+Q\left(x\right)$$ donde $$P\left(x\right)=-5x^4+6x^3-2x^2+3x+8$$ Y $$Q\left(x\right)=2x^4-3x^3+2x^2-4$$

Accepted Answer

$$-3x^4+3x^3+3x+4$$

Answer

$$3x^4+3x^3-3x-4$$

Answer

$$-7x^4+9x^3-4x^2+3x+12$$

Answer

$$7x^4-9x^3+3x+4$$

Question 2

Calcula $$P\left(x\right)-Q\left(x\right)$$ donde $$P\left(x\right)=-5x^4+6x^3-2x^2+3x+8$$ Y $$Q\left(x\right)=2x^4-3x^3+2x^2-4$$

Accepted Answer

$$-7x^4+9x^3-4x^2+3x+12$$

Answer

$$3x^4+3x^3-3x-4$$

Answer

$$-3x^4+3x^3+3x+4$$

Answer

$$7x^4-9x^3+3x+4$$

Question 3

Calcula el cociente y el resto de $$\left(x^5+7x^3-5x+1\right):\left(x^3+2x\right)$$

Accepted Answer

$$C\left(x\right)=x^2+5$$

$$R=-15x+1$$

Answer

$$C\left(x\right)=x+5$$

$$R=-15x$$

Answer

$$C\left(x\right)=x-5$$

$$R=2x-5$$

Answer

$$C\left(x\right)=x^3+2x$$

$$R=x^2-1$$

Question 4

Calcula $$P\left(x\right)\cdot Q\left(x\right)$$ donde $$P\left(x\right)=3x-7$$ Y $$Q\left(x\right)=3x^2-2x+1$$

Accepted Answer

$$9x^3-27x^2+17x-7$$

Answer

$$9x^3-14x+1$$

Answer

$$-7x^4+9x^3-4x^2+3x+12$$

Answer

$$9x^2-27x+17$$

Question 5

Calcula $$\left(x+1\right)-\left(x-1\right)^2$$

Accepted Answer

$$-x^2+3x$$

Answer

$$x^2-3x$$

Answer

$$x^2+3x+2$$

Answer

0

Question 6

Calcula $$\left(x+2y\right)^2$$

Accepted Answer

$$x^2+4xy+4y^2$$

Answer

$$x^2+4y^2$$

Answer

$$x^2-4y^2$$

Answer

$$x^2+4xy+2y^2$$

Question 7

Calcula $$\left(9-\frac{b^2}{9}\right)^2$$

Accepted Answer

$$81-2b^2+\frac{b^4}{81}$$

Answer

$$81-\frac{b^2}{81}$$

Answer

$$81-\frac{b^4}{81}$$

Answer

$$81-\frac{2}{81}b^2+b^4$$

Question 8

Indica el resultado de $$\left(a+b\right)^2$$

Accepted Answer

$$a^2+2ab+b^2$$

Answer

$$2a^2+ab+2b^2$$

Answer

$$a^2\cdot b^2$$

Answer

$$a^2+b^2$$

Question 9

Indica el resultado de $$\left(a+b\right)\left(a-b\right)$$

Accepted Answer

$$a^2-b^2$$

Answer

$$2a^2+ab+2b^2$$

Answer

$$a^2+b^2$$

Answer

$$a^2+2ab+b^2$$

Question 10

$$-7x^3+6x^3$$

Accepted Answer

$$-x^3$$

Answer

$$-x^6$$

Answer

$$-42x^3$$

Answer

No se puede calcular

Question 11

Calcula $$P\left(-1\right)$$ En el polinomio $$P\left(x\right)=4x^3+9x-2$$

Accepted Answer

-15

Answer

11

Answer

-7

Answer

0

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