The answers are (-1,0,2)
The zeroes of the equation means, the numbers which if we substituted with in place of x in the equation will give us a result of 0.
The given equation will equal to zero, only if at least one of the brackets multiplied by each other is equal to zero.
This means that it will equal zero when whether;
x=0 or when

which means
x=2 or when

which means
x=-1
Hope this helps.