Question

Use the function to evaluate the indicated expressions and simplify.
f(x) = -3x2 - 7
f(x+2)=?
f(x)+f(2)=?

Answer 1

substitute (x + 2) into the function -3(x+2)^2 - 7 expand and simplify

find f(2) by substituting x = 2 then simplify f(x) + f(2) = -3x^2 - 7 + (-19)

Answer 2

f( x+2)= -3(x+2)^2 - 7 =-3x^2 -12x -19

f(x) + f(2) = -3x^2 -26

f(x+2) is NOT equal to f(x) + f(2)