Question

Without finding the cubes, factorise (x - 3y) ³+ (3y - 7z)³ + (7z- x)³​

Answer 1

3(x-3y)(3y-7z)(7z-x)

Answer 2

Answer:

let x-3y be a

3y-7z be b

7z-x be c

now a+b+c=x-3y+3y-7z+7z-x=0

and if aplus b plus c is 0 then acube plus bcube plus c cube =3abc

3(x-3y)(3y-7z) (7z-x)

I do hope that it was Useful