Precalculus Examples

$f (x) = - 10 x^{2} + 4 x$ , $x = 11$

Step 1

Replace the variable $x$ with $11$ in the expression.

$f (11) = - 10 {(11)}^{2} + 4 (11)$

Step 2

Simplify the result.

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Step 2.1

Simplify each term.

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Step 2.1.1

Raise $11$ to the power of $2$ .

$f (11) = - 10 \cdot 121 + 4 (11)$

Step 2.1.2

Multiply $- 10$ by $121$ .

$f (11) = - 1210 + 4 (11)$

Step 2.1.3

Multiply $4$ by $11$ .

$f (11) = - 1210 + 44$

Step 2.2

Add $- 1210$ and $44$ .

$f (11) = - 1166$

Step 2.3

The final answer is $- 1166$ .

$- 1166$

Step 3