Solution
= Solution
The <polynomial> factors as
$$
x^3+x^2-16x+20=(x-2)^2(x+5).
$$
Thus the repeated <polynomial root> is \b[$x=2$], of multiplicity two. Its repetition can also be checked from $p(2)=p'(2)=0$ and $p''(2)=14\ne0$.
= Solution
The <polynomial> factors as
$$
x^3+x^2-16x+20=(x-2)^2(x+5).
$$
Thus the repeated <polynomial root> is \b[$x=2$], of multiplicity two. Its repetition can also be checked from $p(2)=p'(2)=0$ and $p''(2)=14\ne0$.