Question

What is the value of x3 + 4, when x = 6?

Answer 1

Well let’s remember the rules of pemdas.

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

Since 6 has a exponent of 3 we could do 6^3 before adding 4. 6^3= 216

So then we would have 216+4.

That would equal 220. The value when x=6 is 220.

Answer 2

Plug in 6 for x
3(6) + 4 = 22
The value if 22, or you can write it like:
f(6) = 22