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Factorise Completely: A2 -16b2 - 2a - 8b - Mathematics

Sum

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

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Solution

a2 -16b2 - 2a - 8b = [(a)4 - (4b)2] - 2(a + 4b)

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

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

Concept: Factorising Completely
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APPEARS IN

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