Vereenvoudig elke uitdrukking volledig: 1.2.1 \( \left(x+2 y^{2}\right)^{2} \) \( 1.2 .2 \frac{3}{x^{2}-3 x-4}-\frac{x+1}{4-x} \) \( 1.2 .3 \quad \frac{4^{x}-6.2^{2 x}}{2^{2(x+2)}} \)

D) A student claimed that the largest integer of \( k \) for which the graph \( y=2 x^{2}-3 x+k-1 \) meets the \( x \)-axis is 2 . Verify this statement.

Risolvi le seques \( \frac{-x^{2}+7 x-12}{2 x^{2}-7 x+3} \geqslant 0 \)

\( \begin{array}{ll} & \text { Solve for } x: \\ 2.1 & (x-5)(x+3)=0 \\ 2.2 & 2^{x-1}=10-2^{x+1} \\ 2.3 & 5^{3 x-6}=125 \\ 2.4 & \frac{x^{2}-3}{2}=x\end{array} \)

18. \( \begin{aligned} y & =x-5 \\ y & =-2 x-5\end{aligned} \)

\( 22 \quad \frac { 1 } { 4 } x - \frac { 5 } { 2 } = - 2 \)