Question

8x³-36x²y+64xy²-27y³
identity (x-y)³

Answer 1

I think you need the rediuced eq so the reduce eq is (2x-3y)³

Answer 2

we can write it as = (2x)³-(3y)³-3*(2x)²*(3y)+3*(2x)*(3y)³

hence , by using (x-y)³ the above equation = (2x-3y)³