Question

1+a^2+a^3+a Factorise this​

Answer 1

1+a²+a³+a

1 (1 + a²) +a (a²+ 1)

1 (1 + a²) + a (1 + a²)

(1 + a) (1 + a²)

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Answer 2

Step-by-step explanation:

a3+a2+a+1

=a3-a2+2a2-2a+a-1

= a2(a-1)+2a(a-1)+1(a-1)

=(a-1)(a2+2a+1)

=(a-1)[(a+1)whole square]

=(a-1)(a+1)(a+1)