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Question
Find the cube of: a + 2
Sum
Solution
(a + 2)3 = (a)3 + (2)3 + 3×a×2(a + 2)
= a3 + 8 + 6a(a+ 2)
= a3 + 8 + 6a2 + 12a
= a3 + 6a2 + 12a+ 8
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Cubes of Binomials
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