Question

Given the two functions f(x)=x²-5 and g(x)=6x-15, what is the value of f(3)?

1) 4
2) 6
3) 9
4) 12

Answer 1

The value of f(x) at x=3 is determined by substituting 3 into the equation f(x)=x²-5, resulting in a calculation of 3² - 5 = 4.

Step-by-step explanation:

To find the value of the function f(x) when x is 3, we simply substitute 3 into the given equation of f(x)=x²-5.

This calculation will follow:

1. Substitute x with 3: f(3) = 3² - 5.
2. Calculate the square of 3: 3² = 9.
3. Subtract 5 from 9: 9 - 5 = 4.

Thus, the value of f(3) is 4.