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Factorise: 1 - 25 (A+ B)2 - Mathematics

Sum

Factorise:  1 - 25 (a+ b)2 

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Solution

1 - 25 (a+ b)2 

= (1)2 - [5(a+b)]2

= [1 + 5(a+b)] [1 - 5(a+b)]

= (1 + 5a + 5b) (1 - 5a - 5b)

Concept: Factorisation by Difference of Two Squares
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (C) | Q 9 | Page 159
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