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Powers: Basic Rules - Raising a Power to Another Power

Which of the following has the same value as \$\$81x^2\$\$?
Correct. [[snippet]] Notice that \$\$81 = 9^2\$\$. Thus, \$\$81x^2 = 9^2x^2\$\$. Since both powers have the same exponent, combine both bases under the same power. >\$\$9^2x^2 = (9x)^2\$\$ Hence, this is the correct answer.
Incorrect. [[Snippet]]
Incorrect. [[Snippet]]
Incorrect. [[Snippet]]
Incorrect. [[Snippet]]
\$\$3x^2\$\$
\$\$(3x)^2\$\$
\$\$(3x)^4\$\$
\$\$9x^2\$\$
\$\$(9x)^2\$\$