Question

If f(x)=x-4 find the value if f(x)+f(-x) ​

Answer 1

2x

Explanation:

f(x) = x -4

Step 1:

y = x - 4

Step 2: Replace y with x

x = y - 4

Step 3: Find y

x + 4 = y

f(-x) = x + 4

f(x) + f(-x) = (x - 4)+ (x + 4) = 2x