Answer :

konrad509
[tex](3y)^4\cdot y^{-2}=81y^4\cdot y^{-2}=81y^{2}[/tex]
Panoyin
[tex](3y)^{4} * y^{-2}[/tex]

[tex]((3y)(3y)(3y)(3y)) * \frac{1}{y^{2}}[/tex]

[tex]81y^{4} * \frac{1}{y^{2}}[/tex]

[tex]81y^{2}[/tex]

D. 81y²

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