Algebra Examples

$f (x) = x^{2} - 4 x - 2$ at $x = 1$

Step 1

Replace the variable $x$ with $1$ in the expression.

$f (1) = {(1)}^{2} - 4 \cdot 1 - 2$

Step 2

Simplify the result.

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Step 2.1

Simplify each term.

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Step 2.1.1

One to any power is one.

$f (1) = 1 - 4 \cdot 1 - 2$

Step 2.1.2

Multiply $- 4$ by $1$ .

$f (1) = 1 - 4 - 2$

Step 2.2

Simplify by subtracting numbers.

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Step 2.2.1

Subtract $4$ from $1$ .

$f (1) = - 3 - 2$

Step 2.2.2

Subtract $2$ from $- 3$ .

$f (1) = - 5$

Step 2.3

The final answer is $- 5$ .

$- 5$

Step 3