Quiz about Equazioni e Polinomi: Test di Competenza

Question 1

Calcola il prodotto notevole: (x + 5)(x - 5).

Accepted Answer

$$x^2-25$$

Answer

$$x^2+25$$

Answer

$$x^2+5$$

Answer

$$x^2-10$$

Question 2

Esegui l'operazione: $$(3x^2+2x)+(4x^2-3x)$$ .

Accepted Answer

$$7x^2-x$$

Answer

$$5x^2+x$$

Answer

$$6x^2-2x$$

Answer

$$8x^2+3x$$

Question 3

Calcola il quadrato di un binomio: $$(2x+3)^2.$$

Accepted Answer

$$4x^2+12x+9$$

Answer

$$4x^2+9$$

Answer

$$4x^2+6x+9$$

Answer

$$2x^2+9x+3$$

Question 4

Esegui l'operazione: $$(x^2+4x+4)-(2x^2-x+1).$$

Accepted Answer

$$-x^2+5x+3$$

Answer

$$-x^2+4x+2$$

Answer

$$x^2+3x+5$$

Answer

$$2x^2-5x+1$$

Question 5

Calcola il prodotto notevole: (3x + 2)(3x - 2).

Accepted Answer

$$9x^2-4$$

Answer

$$9x^2+4$$

Answer

$$6x^2-4$$

Answer

$$9x^2-8$$

Question 6

Esegui l'operazione: $$2(x^2-3x)+3(x^2+x)$$ .

Accepted Answer

$$5x^2-3x$$

Answer

$$4x^2+3x$$

Answer

$$6x^2-2x$$

Answer

$$2x^2-6x$$

Question 7

Calcola il cubo di un binomio: $$(x+1)^3.$$

Accepted Answer

$$x^3+3x^2+3x+1$$

Answer

$$x^3+2x^2+2x+1$$

Answer

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

Answer

$$x^3+3x^2+1$$

Question 8

Esegui l'operazione: $$(x^2+2x)(x-3).$$

Accepted Answer

$$x^3-x^2-6x$$

Answer

$$x^3-9x$$

Answer

$$x^3-5x^2+6$$

Answer

$$x^3+3x^2-6$$

Question 9

Calcola il prodotto notevole: $$(x-4)^2$$ .

Accepted Answer

$$x^2-8x+16$$

Answer

$$x^2-16$$

Answer

$$x^2+8x+16$$

Answer

$$x^2-4x+4$$

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