Question

Factorise 27a³+1/64b³+27a²/4b+9a/16b²​

Answer 1

(3a) ^3 +(1/4b)^3 +27a^2/4b +9a/16b^2

by identity (a+b)^ = a^3 +b^3 +3a^2b +3ab^2

then the answer will be

(3a+1/4b)^3