Question

Factorise by grouping method. a³ + a - 3a² – 3​

Answer 1

Hi,

Explanation:

2 ways:

1)

`a^3+a-3a^2-3=a(a^2+1)-3(a^2+1)=(a^2+1)(a-3)\\`

2)

`a^3+a-3a^2-3=a^3-3a^2+a-3=a^2(a-3)+(a-3)=(a-3)(a^2+1)\\`

Answer 2

I’m not sure if this could be the answer