volume_mute
x(x+3)(x+9)
publish date: 2020/12/29 00:41:00 GMT+11
volume_mute
x^2-12x^3+27
x+12x^2+27x
x^3+12x^2+27x
Correct Answer
x^3+12x^2+27x
Explanation
(X+3)(x+9)= x^2+12x+27
x(x^2+12x+27)= x^3+12x^2+27x
=x^3+12x^2+27x