Q22 of 30 Page 2

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

(2a + b)3 + (2a - b)3 = (8a3 + 12a2b + 3ab2 + b3)+(8a3 - 12a2b + 3ab2 - b3)
                             = 16a3 + 6ab2

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