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 : a (a -4) - a + 4

Factorise using the grouping method :
a² + 4b² - 3a + 6b - 4ab

Factorise : ab - 2b + a² - 2a

Factorise:

2a − 4b − xa + 2bx

Factorise : xy - ay - ax + a² + bx - ab

Factorise : x² - (b - 2)x - 2b

Factorise: 2(x + 2y)² − 5(x + 2y) + 2

factorise: (3x - 2y)² - 5(3x - 2y) - 24

factorise: b(c - d)² + a(d - c) + 3(c - d)

Factorise the following by grouping the terms:

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