Algebra Examples

Evaluate ${(- 9)}^{2} \cdot {(- 9)}^{2}$

Step 1

Multiply ${(- 9)}^{2}$ by ${(- 9)}^{2}$ by adding the exponents.

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Step 1.1

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

${(- 9)}^{2 + 2}$

Step 1.2

Add $2$ and $2$ .

${(- 9)}^{4}$

Step 2

Raise $- 9$ to the power of $4$ .

$6561$