Question

Factorise a+2b+a³+8b³

Answer 1

Answer:

Step-by-step explanation:

a+2b + (a+2b)³ - 3 a 2b (a+2b)

(a+2b)(1+ a²+4b²+4ab-6ab)

(a+2b)(1+ a²+4b²-2ab)

Answer 2

Step-by-step explanation:

(a+2b)³=a³+_____+12ab²+8b³