Factorise completely: a2 - 16b2 - 2a - 8b - Mathematics

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Sum

Factorise completely: a2 - 16b2 - 2a - 8b

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Solution

a2 - 16b2 - 2a - 8b

= (a)2 - (4b)2 - 2(a + 4b)

= (a + 4b)(a - 4b) - 2(a + 4b)

= (a + 4b)(a - 4b - 2)

Concept: Factorising Completely
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Chapter 13: Factorisation - Exercise 13 (E) [Page 162]

APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (E) | Q 20 | Page 162
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