The coordinates of a triangle are P(1,4), Q(3,6), and R(5,2). The triangle is reflected over a line and its image
coordinates are P'(-1, 4), Q'(-3, 6), and R'(-5, 2).

a is the correct

(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