Question

Find f(3) when f(x)=x^2 -3x-1

Answer 1

Answer:

The value of f(3) when f(x) = x^2 - 3x - 1 is equal to -1

Solution:

The function that is mentioned to us in the question is

$f(x)=x^{2}-3 x-1$

We are asked to find the value of f(3)

The value of f(3) can be found by substituting 3 in place of “x” in the given function f(x)

Finding the value of f(3):

Now, for f(3), we substitute x= 3 in the above function,

$f(3)=(3)^{2}-3(3)-1$

f(3) = 9 - 9 - 1

f(3) = -1

Thus the value of f(3) when f(x) = x^2 - 3x - 1 is equal to -1

Answer 2

First replace all x with 3
3^2 -3(3) -1

Then distribute
9 -9 -1

Then add everything
-1

Answer = -1