Hi

(3a^2b + 2ab^2)^2 

(3a^2b + 2ab^2)(3a^2b + 2ab^2)

 9a^4b^2 + 6a^3b^3 + 6a^3b^3 + 4a^2b^4

 9a^4b^2 + 12a^3b^3 + 4a^2b^4

 

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Thanks for the help ;)

Multiply and them simplify if possible

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