Quiz about Екі өрнектің квадраттарының айырмасы

Question 1

$$\left(a-2\right)\left(a+2\right)=$$

Accepted Answer

$$a^2-4$$

Answer

$$a^2+4$$

Answer

$$4-a^2$$

Answer

$$4+a^2$$

Question 2

$$4n^2-49m^2=$$

Accepted Answer

$$\left(2n-7m\right)\left(2n+7m\right)$$

Answer

$$\left(n+7\right)\left(n-7\right)$$

Answer

$$\left(2-m\right)\left(2+m\right)$$

Answer

$$\left(4n-49m\right)\left(4n+49m\right)$$

Question 3

$$81-9a^2=$$

Accepted Answer

$$\left(9-3a\right)\left(9+3a\right)$$

Answer

$$\left(3a+9\right)\left(3a-9\right)$$

Answer

$$\left(81-9a\right)\left(81+9a\right)$$

Answer

$$\left(3a-9\right)\left(3a+9\right)$$

Question 4

$$\left(z-3s\right)\left(z+3s\right)=$$

Accepted Answer

$$z^2-9s^2$$

Answer

$$3z^2+s^2$$

Answer

$$z^2+9s^2$$

Answer

$$3z^2-9s^2$$

Question 5

$$Бос\ орынға\ тиісті\ санды\ қойыңыз:\ \left(...t-9b\right)\left(...t+9b\right)=100t^2-81b^2$$

Accepted Answer

10

Answer

100

Answer

20

Answer

200

Question 6

$$121n^2-144m^2=$$

Accepted Answer

$$\left(11n-12m\right)\left(11n+12m\right)$$

Answer

$$\left(11n-12m\right)^2$$

Answer

$$\left(11n+12m\right)\left(12m-11n\right)$$

Answer

$$11n^2-12m^2$$

Question 7

$$Теңдеудің\ мәнін\ тап:\ x^2-225=0$$

Accepted Answer

$$x=15$$

Answer

$$x=25$$

Answer

$$x=2,5$$

Answer

$$x=1,5$$

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