Polynomial Roots and Graphing

This program updates the TI-89 Polygraf() function by changing the method of data input, making entry more user friendly. Roots are found much more quickly than in previous versions, especially for higher degree polynomials. Polygraf() finds all roots, real, complex, and repeated, of an n th degree polynomial equation, finds minimum and maximum, and then graphs the polynomial function. The function can be displayed in fully factored form and allows you to toggle between Auto and Approx displays for the roots and factors. The program uses the cZeros() function repeatedly, and in many cases returns results in exact form rather than decimal form.