1.
[tex]w(x) = 2x^{3}-4x^{2}-3x+6\\\\W(-1) = 2\cdot(-1)^{3} - 4\cdot(-1)^{2}-3\cdot(-1)+6 = 2\cdot(-1)-4\cdot1 + 3 + 6 = \\\\=-2-4+9 = 3[/tex]
2.
[tex]A(-5,6) \ \ \ \ \ \ B(3,8)\\A(x_{A},y_{A}) \ \ \ \ B(x_{B}, y_{B})\\\\S = (\frac{x_{A}+x_{B}}{2}, \frac{y_{A}+y_{B}}{2})\\\\S = (\frac{-5+3}{2},\frac{6+8}{2})\\\\S = (\frac{-2}{2}, \frac{14}{2})\\\\S = (-1, 7)[/tex]
