# Example 1 - Chapter 12 Class 8 Factorisation

Last updated at April 16, 2024 by Teachoo

Factorisation using common factors

Factorization by common factors

Ex 12.1, 1 (i)

Ex 12.1, 1 (ii)

Ex 12.1, 1 (iii) Important

Ex 12.1, 1 (iv) Important

Ex 12.1, 1 (v)

Ex 12.1, 1 (vi) Important

Ex 12.1, 1 (vii)

Ex 12.1, 1 (viii) Important

Example 2 Important

Example 1 You are here

Ex 12.1, 2 (i)

Ex 12.1, 2 (ii) Important

Ex 12.1, 2 (iii)

Ex 12.1, 2 (iv) Important

Ex 12.1, 2 (v)

Ex 12.1, 2 (vi)

Ex 12.1, 2 (vii)

Ex 12.1, 2 (viii) Important

Ex 12.1, 2 (ix)

Ex 12.1, 2 (x) Important

Last updated at April 16, 2024 by Teachoo

Example 1 Factorise 12𝑎^2b + 15〖𝑎𝑏〗^2 12a^2b + 15ab^2 12a^2b = 12 × a^2b = 2 × 2 × 3 × a^2b = 2 × 2 × 3 × a × a × b 15ab^2 = 15 × ab^2 = 3 × 5 × ab^2 = 3 × 5 × a × b × b Now, 12ab^2 = 2 × 2 × 3 × a × a × b 15ab^2 = 3 × 5 × a × b × b So, 3, a, b are common factors. 12ab^2 + 15ab^2 = 2 × 2 × 3 × a × a × b + 3 × 5 × a × b × b = 3 × a × b (2 × 2 × a + 5 × b) = 3ab (4a + 5b)