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Factorise: 5 - 4x(1 + 3x) - Mathematics

Sum

factorise: 5 - 4x(1 + 3x)

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Solution

5 - 4x(1 + 3x)

= 5 - 4x - 12x2 

= 5 - 10x + 6x - 12x2

= 5(1 - 2x)+ 6x (1 - 2x)

= (1 - 2x)(5 + 6x) 

Concept: Factorisation by Grouping
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (F) | Q 4.6 | Page 163
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