\( ( \begin{array} { c c c c } { 1 } & { 2 } & { 2 } & { 0 } \\ { 3 } & { - 1 } & { 0 } & { 0 } \\ { 1 } & { 0 } & { 0 } & { 0 } \\ { 1 } & { 2 } & { 1 } & { 1 } \end{array} | \)

\( \qquad \{ ( x + y ) ^ { 2 } = ( x - y ) ^ { 2 } + x ( 4 y - 1 ) - 3 ( x - 2 y ) 5 ( x - 1 ) - \frac { y - 3 } { 2 } = 4 ( x + y + 1 ) \)

13. U silosu se nalazi \( 1.2 \cdot 10^{10} \) zrna žita. Ako se četvrtina samelje u brašno, a šestina od preostaloga žita proda, koliko je zrna žita ostalo u silosu?

\( \begin{array}{ll}\text { c. } \sqrt{32}=\square & \text { d. }-\sqrt{90}=\square\end{array} \)

Given: If we need to solve \( x \), we will need to study the denominators and determine the restrictions. The restrictions for this equation are: \[ \begin{array}{l}x \neq 1 ; x \neq 2 \\ x \neq-1 ; x \neq 2 \\ x \neq 1 ; x \neq 2 ; x \neq-1 \\ x \neq 1 ; x \neq-2 ; x \neq-1\end{array} \]

Vercicio 2: \( y^{\prime \prime}-4 y=8 e^{2 x} \)