Algebra Examples

$A (2) = 2 x^{3} + 5$

Step 1

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

$A (2) = 2 {(2)}^{3} + 5$

Step 2

Simplify the result.

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Step 2.1

Simplify each term.

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Step 2.1.1

Multiply $2$ by ${(2)}^{3}$ by adding the exponents.

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Step 2.1.1.1

Multiply $2$ by ${(2)}^{3}$ .

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Step 2.1.1.1.1

Raise $2$ to the power of $1$ .

$A (2) = 2 {(2)}^{3} + 5$

Step 2.1.1.1.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$A (2) = 2^{1 + 3} + 5$

Step 2.1.1.2

Add $1$ and $3$ .

$A (2) = 2^{4} + 5$

Step 2.1.2

Raise $2$ to the power of $4$ .

$A (2) = 16 + 5$

Step 2.2

Add $16$ and $5$ .

$A (2) = 21$

Step 2.3

The final answer is $21$ .

$21$

Step 3