Question

a² + 2a2 - a - 2 factorise ​

Answer 1

Answer: (a+1)(a-1)(a+2)

Step-by-step explanation:

⇒ a² + 2a2 - a - 2

⇒ a²(a+2)-1(a+2)

⇒ (a²-1)(a+2)

⇒(a+1)(a-1)(a+2)      (a²-b²=(a+b)(a-b)

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