f(x)=-2x^2+x-5 find: f(5)

Question

I also have to answer the following as well with same equation.

  Find: f(-6)=

  find: f(-1/3=

 

also need answered 

  1. f(x)=2x^2+4x+5

       find: f(a)=

  using same as above find: f(a+h)

Answer 1

f(x) = -2x² + x - 5

f(5) = -2(5)² - 5

f(5) = -2(25) - 5

f(5) = -50 - 5

f(5) = -55

 

Use the above to pattern the remainder of the values.