Factorise: a2 + 5a + 6

factorise: a² + 5a + 6

Sum

a² + 5a + 6

= a² + 2a + 3a + 6

= a(a + 2) + 3(a + 2)

= (a + 2) (a + 3)

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Factorisation by Grouping

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Chapter 13: Factorisation - Exercise 13 (D) [Page 161]

Chapter 13 Factorisation
Exercise 13 (D) | Q 3 | Page 161

Factorise by the grouping method :
`a^2 + 1/a^2 - 2 - 3a + 3/a`

Factorize using the grouping method:

x² + y² + x + y + 2xy

factorise: x² + 5xy + 4y²

factorise: 14x² + x - 3

factorise: 5 + 7x - 6x²

Factorise: 2(x + 2y)² − 5(x + 2y) + 2

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

Factorise the following by grouping the terms:
8x³ - 24x²y + 54xy² -162y³

Factorise the following by grouping the terms:
2a + b + 3c - d + (2a + b)³ + (2a + b)²(3c - d)

Factorise the following by grouping the terms:

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