Factorise : 3a2b - 12a2 - 9b + 36

Factorise : 3a²b - 12a² - 9b + 36

Sum

3a²b - 12a² - 9b + 36

= 3a² (b - 4) - 9 (b - 4)

= (b - 4) (3a²- 9) = (b - 4) 3 (a² - 3)

= 3 (b - 4) (a²-3)

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Factorisation by Grouping

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Chapter 13: Factorisation - Exercise 13 (B) [Page 158]

Chapter 13 Factorisation
Exercise 13 (B) | Q 10 | Page 158

Factorise by the grouping method : ab - 2b + a² - 2a

Factorise : a² - ab - ca + bc

Factorise : a³ -a² +a -1

Factorise : (a² − b²) c + (b² − c²)a

factorise: x² + 4x + 3

factorise: 14x² + x - 3

factorise: 8 + 6(a + b) - 5(a + b)²

Factorise: 2(x + 2y)² − 5(x + 2y) + 2

Factorise the following by grouping the terms:
8(2a + b)² - 8a -4b

Factorise the following by grouping the terms:

`(1)/(25x^2) + 16x^2 + (8)/(5) - 12x - (3)/(5x)`