1. The first question asks to find the roots of a polynomial equation. 2. Roots of a polynomial are values of $x$ where the polynomial equals zero. 3. The options given are sets of roots: a. $x=0, x=-1$; b. $x=1, x=0$; c. $x=0, 5$; d. $x=5$. 4. Since the problem does not provide the polynomial explicitly, we assume the correct roots are those listed in option a: $x=0$ and $x=-1$. 5. Therefore, the answer to the first question is option a: $x=0, x=-1$.