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Factorise: 1 - 18x - 63x2 - Mathematics

Sum

factorise: 1 - 18x - 63x2 

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Solution

1 - 18x - 63x2 

= 1 - 21x + 3x - 63x2

= 1 (1 - 21x) + 3x (1 - 21x)

= (1 - 21 x) (1 + 3x)

Concept: Factorisation by Grouping
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (F) | Q 4.3 | Page 163
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