Question

If f(x) = x³ - 2, find f(3).

Answer 1

$f(x) = x {}^{3} - 2 \\ f(3) = 3 {}^{3} - 2 = 27 - 2 = 25$

$f(3) = 25$

Answer 2

So if f(x) = x^3 - 2 you would insert three in the function

So instead of x it’s 3.

3^3 - 2 = 9 -2
= 7

So the answer of the function is 7.