Question

x^3-(x+3)^3

Answer 1

=x^3-(x^3+9x^2+27x+27)

=x^3-x^3-9x^2-27x-27

=-9x^2-27x-27

=-9(x^2+3x+3)

Answer 2

`x^3 - (x+3)^3`

`=[x-(x+3)] . [x^2 + x(x+3) + (x+3)^{2}]`

`=-3 . (x^2 + x^2 + 3x + x^2 + 6x + 9)`

`=-3(3x^2 + 9x + 9)`

`=-9(x^2 + 3x + 3)`