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Factorise completely:  a4 - b4 - Mathematics

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Sum

Factorise completely:  a4 - b4 

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Solution

a4 - b4 = (a2)2 - (b2)2

= (a2 + b2) (a2 - b2)

= (a2 + b2)(a + b)(a - b) 

Concept: Factorising Completely
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (E) | Q 6 | Page 162
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