(а-b)^3+b^3;m^3n^3-k^3;(x-2)^3-27;x^6+y^6;8a^3+(a-b)^3;k^6-(pg)^6;27x^3-y^3(x-y)^3

Question

(а-b)^3+b^3;m^3n^3-k^3;(x-2)^3-27;x^6+y^6;8a^3+(a-b)^3;k^6-(pg)^6;27x^3-y^3(x-y)^3

Answer 1

(a-b)³+b³=(a-b+b)( [a-b]²-b(a-b)+b²)= a(a²-2ab+b²-ab+b²+b²)=a(a²-3ab+3b²)