Let \( \left(3 A^{T}-I_{2}\right)^{-1}=\left[\begin{array}{ll}2 & 2 \\ 3 & 4\end{array}\right] \) Then the matrix \( A \) is given by:

(2) \( x^{2}-7 x-18 \rightarrow x^{2}+b x+c \)

6. \( f(x)=\left(x^{2}-1\right)\left(3 x^{2}-6 x+5\right)-(x+4)\left(4 x^{2}-2 x+1\right) \) 7. \( f(x)=\frac{3}{2}(\sqrt{x}-4)(4 x-5) \) 8. \( f(x)=(2 x-1)(3 x+4)(x+7) \) 9. \( f(x)=\frac{8 x^{2}-2 x+1}{x^{2}-5 x} \) 10. \( f(x)=\frac{x^{2}-4 x+3}{2 x^{2}-3 x+2} \)

Form a polynomial whose real zeros and degree are given. Zeros:-5,-4,3,5; degree: 4 . A polynomial with integer coefficients and a leading coefficient of 1 is \( f(x)= \). (Simplify your answer.)

3) \( \begin{array}{l}2 x+y=1 \\ 2 x-y=3\end{array} \)

Express the product of \( (2+\sqrt{-9}) \) and \( (3-\sqrt{-16}) \) in the form \( a+b i \). (complex and imaginany