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Find the Cube of : a + 2 - Mathematics

Sum

Find the cube of: a + 2

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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

Concept: Cubes of Binomials
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (B) | Q 5.1 | Page 152
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