Quiz about Examen III Trimestre Noveno EGB

Question 1

Resuelve: $$\left(2x-3y\right)\left(2x+3y\right)$$

Accepted Answer

$$4x^2-9y^2$$

Answer

$$4x^2+3y^2$$

Answer

$$2x^2-3y^2$$

Answer

$$4x+9y$$

Question 2

Resuelve: $$\left(2x-y\right)^2$$

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 3

Factoriza: $$24a-12ab=$$

Accepted Answer

$$12a\left(2-b\right)$$

Answer

$$24a\left(2-b\right)$$

Answer

$$12b\left(2-a\right)$$

Answer

$$24b\left(2-a\right)$$

Question 4

Factoriza: $$x^2-3x-28=$$

Accepted Answer

$$\left(x-7\right)\left(x+4\right)$$

Answer

$$\left(x+7\right)\left(x+4\right)$$

Answer

$$\left(x-7\right)\left(x-4\right)$$

Answer

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

Question 5

Factoriza: $$x^4-y^2=$$

Accepted Answer

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

Answer

$$\left(x+y\right)\left(x-y\right)$$

Answer

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

Answer

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

Question 6

Factoriza: $$9y^2-12y+4=$$

Accepted Answer

$$\left(3y-2\right)^2$$

Answer

$$\left(3y+4\right)\left(3y-4\right)$$

Answer

$$\left(3y+2\right)^3$$

Answer

$$\left(3y+2\right)\left(3y-2\right)$$

Question 7

Racionaliza: $$\frac{4}{\sqrt[3]{5}}$$

Accepted Answer

$$\frac{4\sqrt[3]{5^2}}{5}$$

Answer

$$\frac{\sqrt[3]{5}}{4}$$

Answer

$$\frac{4}{5}$$

Answer

$$\frac{4}{\sqrt[3]{5}}$$

Question 8

Punto donde se cortan las tres mediatrices

Accepted Answer

Circuncentro

Answer

Baricentro

Answer

Incetro

Answer

Ortocentro

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