Question

simplify the following : ( a² + a + 4 ) ( a - 2 ) answer is a³ - 8 I need step by step solution ​

Answer 1

Answer:

(a^3 - 8) can be also written as (a)^3 - (2)^3

Now , we know

(x)^3 - (y)^3

= (x^2 + xy + y^2) (x - y)

in the same format we have

( a² + 2a + 4 ) ( a - 2 )