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Factorise: A4 - 625 - Mathematics

Sum

Factorise: a4 - 625 

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Solution

a4 - 625 

= (a2)2 - (25)2 

= (a2 + 25) (a2 - 25)    ....[a2 - b2 = (a + b)(a - b)]

= (a2 + 25) {(a)2 - (5)2

= (a2 + 25) (a + 5)(a - 5) 

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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (F) | Q 8.4 | Page 163
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