# How do I find real zeros of f(x) = x^5 - 3x^4 + 11x - 9 on a TI-84?

The second property is the factor property which states that any factor of the polynomial, must be a factor of the constant term; in the case of your question, it is 9. This means the window should be set to $x \in \left[- 9 , 9\right]$. Since we don't care about minimums or maximums when looking for zeros, we can set $y \in \left[- 5 , 5\right]$ (if the curve is really steep, you can make the range larger). Press the "WINDOW" button on the top row to set your window size.
Next, you need to enter the function into your calculator. You do this by pressing the "Y=" button at the top left of your calculator. Then press "GRAPH". Once you see the zeros, you may want to adjust your window size to see the zero more clearly; in the case of your question $x \in \left[0 , 3\right]$.