1.

(3a-2b) (3a+2b)

Answer»

By using the identity, (a+b)(a-b)= a square - b square..

(3a+2b)(3a-2b)= 3a^2- 2a^2= 9a^2 - 4a^2

The answer to the question is 9a^2 - 4a^2.



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