Precalculus Examples

$f (x) = x^{2} - 1$ , $x = 0$

Step 1

Replace the variable $x$ with $0$ in the expression.

$f (0) = {(0)}^{2} - 1$

Step 2

Simplify the result.

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Step 2.1

Raising $0$ to any positive power yields $0$ .

$f (0) = 0 - 1$

Step 2.2

Subtract $1$ from $0$ .

$f (0) = - 1$

Step 2.3

The final answer is $- 1$ .

$- 1$

Step 3