Question 231974
{{{F(z)=2z^(2)+8z-3}}} find F(-7)
Just plug in z = -7 everywhere and then simplify
{{{F(z)=2z^(2)+8z-3}}} 
{{{F(-7)=2(-7)^(2)+8(-7)-3}}} 
{{{F(-7) = 2*49 - 56 - 3}}}
{{{F(-7) = 98 - 59}}}
{{{F(-7) = 39}}}