Question

factorise 27x²-27x²y+9xy²-y³​

Answer 1

Answer:

27x³-27x²y+9xy²-y³.

(3x)³-3(3x)(y)(3x-y)-y³.

It is in the form of a³-3ab(a-b)-b³=(a-b)³.

a=3x. b=y.

(3x)³-3(3x)(y)(3x-y)-y³=(3x-y)³.

I think this is your answer.