Finite Math Examples

$f (x) = x (2 x - 1)$ , $f (- 2)$

Step 1

Replace the variable $x$ with $- 2$ in the expression.

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

Step 2

Simplify $(- 2) (2 (- 2) - 1)$ .

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Step 2.1

Remove parentheses.

$(- 2) (2 (- 2) - 1)$

Step 2.2

Multiply $2$ by $- 2$ .

$- 2 (- 4 - 1)$

Step 2.3

Subtract $1$ from $- 4$ .

$- 2 \cdot - 5$

Step 2.4

Multiply $- 2$ by $- 5$ .

$10$