Press [2nd] [trace] to access the calculate menu.

How to find zeros of a polynomial function using a graphing calculator. The zeros of these functions be easily found without one. To find the zero of the function, find the x value where f (x) = 0. Then we equate the factors with zero and get the roots of a function.

Press [2] to select the zero option. When the function is a lower order polynomial such as a linear or quadratic, a graphing calculator is not necessary.