Question

Factorise: a^6-8a^3-7. (No rubbish answers please). ​

Answer 1

a⁶ - 8a³ - 7

a³(a³ - 8) - 7

a³(a³-2³)- 7

a³{(a-2)(a²+2a+2²)} - 7

a³{(a-2)(a²+2a+4)} - 7

a³{(a-2)(a²+2(a+2))} - 7

I think this is the answer.

Hope it helps though

have a great day