If F (x) = 2x + 5 then f (x + 3) =

Answer: 2x - 1

Step-by-step explanation:

Given;

F (x) = 2x + 5 ... *

we are to find F (x + 3)

The first thing we will do is to equate x and x + 3 but it is clear that x in not equal to x + 3, so we will write it as:

x = y + 3 and then make y the subject of the formula:

x = y + 3, that is

y = x - 3

This means that y (x) = f (x-3)

substitute x - 3 for x in the original expression given, that is

F (x+3) = 2 (x - 3) + 5

F (x + 3) = 2x - 6 + 5

F (x + 3) = 2x - 1

Answer: Fx+3F

Step-by-step explanation: you just use distributive property and multiply (f•x) + (F•3)