Question

F(x)=x^2-2; find f(8)

Answer 1

The answer to the equation is F(8) = 62.

Explanation:

What do we know?

We know the equation is
`F(x) = x^2-2`.

We also know we're trying to find F(8).

What is substitution?

Substitution is when a number is put in place of a value. Ex: x + 1 = 3. (2) + 1 = 3. We put 2 in place of x.

Now that we know that, we can solve the problem using substitution.

`F(x)=x^2-2`

`F(8)=8^2-2`

`F(8)=64-2`

`F(8)=62`

By using substitution, we were able to find that
`F(8)=62`.