ii) \( (3-b)\left(9+3 b+b^{2}\right) \)

4. Бүтэн квадрат ялгах замаар уржигдэхуун болгон задал. \( \begin{array}{lll}\text { а) } x^{2}+8 x-33 & \text { д) } x^{2}+12 x-45 & \text { ж) } x^{2}+x-30 \\ \text { б) } x^{2}+12 x-64 & \text { е) } x^{2}+14 x+24 & \text { к) } x^{2}-7 x+12 \\ \text { в) } x^{2}-8 x-20 & \text { ё) } x^{2}-11 x+30 & \\ \text { г) } x^{2}-4 x-45 & \text { з) } x^{2}-11 x-60\end{array} \)

\[ f(x)=f(x+1)+3 \] \( f(1)=11 \) olduğuna göre, \( f(3) \) kaçtır? \( \begin{array}{llll}\text { A) } 17 & \text { B) } 13 & \text { C) } 11 & \text { D) } 7\end{array} \) (E) 5

\( 5 a^{3}+a-3 \) ва \( -2 a^{3}+4 a+5 \)

Simplify the following expression using exponents: \( \frac{y^{\frac{5}{6}}}{y^{\frac{1}{3}}} \)

4) Discutere e risolvere il seguente sistema lineare al variare del parametro \( k \in \mathbb{R} \) : \[ \begin{array}{l}k x+y+z=1 \\ x+k y+z=1 \\ x+y+k z=1\end{array} \]