The point (2, –4) is reflected across the line y = –1. what are the coordinates of the image?
a.(–5, –4)
b.(–4, 2)
c.(2, 2)
d.(2, 4)

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3