Question

Suppose that the functions R and S are defined for all real numbers
as follows.
R(x)=x-4
S(x)=4x^2

Write the expressions for (R+S)(x) and (R.S)(x) and evaluate (r-s)(-1)
(R+S)(x) =
(R.S)(x) =
(r-s)(-1) =

Answer 1

(R+S)(x) = x-4 + 4x^2
(R-S)(x)  = x -4 - 4x^2
(R-S)(-1) = (-1)-4 -4(-1)^2  = -5 - 4 = -9

Can you do the rest?