`8(a+b)^(3)+27(b+c)^(3)`

Factorise : 8a^(3) - 27b^(3)

If a - 2b + 3c= 0 , state the value of a^(3) -8b^(3) + 27c^(3)

Factorise : a- 3b +a^(3) - 27b^(3)

Factorise : (i) 9a^(3)-27b^(3) " " (ii) a^(3)-343 " " (iii) a^(3)-(27)/(a^(3)) " " (iv) 1+8a^(3) " " (v) (a+b)^(3)-(a-b)^(3) .