Question

Factorise: (a+b)³ - a - b​

Answer 1

Answer:

(a+b)(a+b+1)(a+b-1)

Step-by-step explanation:

(a+b)³ - a - b

= (a+b)³ - (a+b) [minus sign was taken common]

= (a+b){(a+b)² - 1} [it gives the form a²-b²]

= (a+b){(a+b)² - 1²} [a²-b²=(a+b)(a-b)]

= (a+b)(a+b+1)(a+b-1). Ans.

Hope you'll understand it.

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