Question 90076
If {{{f(t) = 2t^2-4t-1}}}, find: f(2) the f(-1)
To do these problems, just substitute t = 2 to find f(2) and then t = -1 to find f(-1).
{{{f(2) = 2(2)^2-4(2)-1}}}
{{{f(2) = 2(4)-8-1}}} Simplify.
{{{f(2) = 8-8-1}}}
{{{f(2) = -1}}}...and
{{{f(-1) = 2(-1)^2-4(-1)-1}}}
{{{f(-1) = 2-(-4)-1}}} Simplify.
{{{f(-1) = 2+4-1}}}
{{{f(-1) = 6-1}}}
{{{f(-1) = 5}}}