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2 + 0 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

Factorization of 9a2 -16b2 is:

(3a-4b)(3a+4b)

(3+4b)(3a+4)

(3a-4b)(3a-4b)

(3a+4b)(3a+4b)