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

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Question

Factorise completely:

a2 − 16b2 − 2a − 8b

Sum
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Solution

a2 − 16b2 − 2a − 8b

Using the formula

(x2 − y2) = (x + y)(x − y) 

= (a2 − 16b2) − (2a + 8b)

= (a + 4b)(a − 4b) − 2(a + 4b)

= (a + 4b)(a − 4b − 2)

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

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