Calculus Examples

$f (2) = 3 x^{2} - 7 x$

Step 1

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

$f (2) = 3 {(2)}^{2} - 7 \cdot 2$

Step 2

Simplify the result.

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Step 2.1

Simplify each term.

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Step 2.1.1

Raise $2$ to the power of $2$ .

$f (2) = 3 \cdot 4 - 7 \cdot 2$

Step 2.1.2

Multiply $3$ by $4$ .

$f (2) = 12 - 7 \cdot 2$

Step 2.1.3

Multiply $- 7$ by $2$ .

$f (2) = 12 - 14$

Step 2.2

Subtract $14$ from $12$ .

$f (2) = - 2$

Step 2.3

The final answer is $- 2$ .

$- 2$

Step 3