Divide the expression. \( \frac{6 x^{4}-2 x^{2}+6}{x^{2}+2} \) \( \frac{6 x^{4}-2 x^{2}+6}{x^{2}+2}=\square \) (Simplify your answer.)

7. Prove that \( (\sqrt{3}+1)(\sqrt{3}-1)=2 \) using this, i) Find \( \frac{2}{1+\sqrt{3}} \). ii) Find \( \frac{2}{\sqrt{3}-1} \). iii) Prove that \( \frac{1}{1+\sqrt{3}}+\frac{1}{\sqrt{3}-1}=\sqrt{3} \).

3123 Ligger punkten \( (2,10) \) på grafen till a) \( y=3 x+4 \) b) \( y=12 x-10 \) c) \( y=12-x \)

1) \( x^{2}+3(y+z) x+(y+2 z)(2 y+z) \)

11. Solve: \( x+25 \% \) of \( x=\operatorname{Rs} 555 \)

Gwem the \( A=\left(\begin{array}{cc}3 & 1 \\ -4 & 2\end{array}\right) \) find \( A^{-1} \)