Question

Which are differences of perfect cubes? Check all that apply.

9a3 – 27
125a12 – 72
216a6 – 27y3
8a15 – 27
225a3 – 216

Answer 1

@Nnesha

Answer 2

@hartnn

Answer 3

differences of cube is of the form
\(x^3 -y^3 \)

lets take example 1 :
9a^3 -27
27 is a perfect cube of 3
a^3 is the perfect cube of a
but 9a^3 is not a perfect cube....
so its not A

Answer 4

similarly check all options
both the terms must be a perfect cube,
only then you get difference of cubes...