i need to get this done, please help

The expression that is a sum of cubes is given as follows:
[tex]-27a^3b^6 + 8a^9b^12[/tex]
An expression that is a sum of cubes is given as follows:
a³ + b³.
For the sum, all numeric factors have to be powers of 3, while all exponents have to be multiples of 3. Hence the expression that is a sum of cubes is given as follows:
[tex]-27a^3b^6 + 8a^9b^12[/tex]
More can be learned about a sum of cubes at https://brainly.com/question/26726803
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