Equate the factors of the polynomial equation to 0, to obtain the zeros of the equation.
For (x-6),

In polynomial equation the power of factor (x - 6) is 3. So multiplicity is 3.
For (x + 5),

The power of factor (x + 5) is 2, so multiplicity is 2.
For (x + 10),

The power of factor (x + 10) is 1, so multiplicity is 1.
For (x-23),

The power of factor (x - 23) is 3, so multiplicity is 3.