Factorise: 3 - a (4 + 7a) - Mathematics

Factorise : 3 - a (4 + 7a)

Sum

3 - a (4 + 7a)
= 3 - 4a - 7a2
= 3 - 7a + 3a - 7a2
= 1( 3 - 7a ) + a( 3 - 7a )
= ( 3 - 7a )( a + 1 )

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Chapter 5: Factorisation - Exercise 5 (B) [Page 71]

Chapter 5 Factorisation
Exercise 5 (B) | Q 9 | Page 71

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