Which expression is a perfect cube? -8x^21y^8 -64x^64y^64 -125x^9y^20 -216x^9y^18

asked Jun 16, 2023 184k views

25 votes

Which expression is a perfect cube?

-8x^21y^8
-64x^64y^64
-125x^9y^20
-216x^9y^18

3.9k points

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10 votes

Answer:

-216x^9y^(18)

Explanation:

$~~-216 x^9 y^(18)\\\\=(-6)^3 (x^3)^3 (y^6)^3\\\\=(-6x^3 y^6)^3$

Daniel Barden answered Jun 22, 2023

4.7k points

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