Try the following SAT math question (No Calculator) that tests your understanding of x-intercepts and factors of a polynomial function.

In the $xy$-coordinate plane, the three $x$-intercepts of the graph of the polynomial function $p$ are $-1, 0,$ and $2$. Which of the following is NOT a factor of $p$?

- $\quad x^2-1$
- $\quad x^2+x$
- $\quad x^2-2x$
- $\quad x^2-x-2$

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