50. If \( x+y=6 \) and \( 3 x-y=4 \), then \( x-y \) is \( \begin{array}{ll}\text { (a) } 0 & \text { (b) }-1 \\ \text { (c) } 2 & \text { (d) } 4\end{array} \)

If a function \( f(x) = 3x + 2 \), what is its inverse function?

76. Решите графически систему линейных уравнений: \( \begin{array}{ll}\text { а) }\left\{\begin{array}{l}x-y=1, \\ x+3 y=9 ;\end{array}\right. & \text { в) }\left\{\begin{array}{l}x+y=0, \\ -3 x+4 y=14 ;\end{array}\right. \\ \text { б) }\left\{\begin{array}{ll}x+2 y=4, \\ -2 x+5 y=10 ; & \text { г) }\left\{\begin{array}{l}3 x-2 y=6, \\ 3 x+10 y=-12\end{array}\right.\end{array}\right.\end{array} \).

Find the factar of \( x^{5}+x^{4}-13 x^{3}-13 x^{2}+36 x+36 \) of list three facturs.

\( 6 x^{3}-5 x^{7}+6 \) leading term? Leading cafficient? Turning Caint?

Find the factar of \( x^{5}+x^{4}-13 x^{3}-13 x^{2}+36 x+36 \) ai list three factars.