In this video we will discuss how to find roots of highr order (higher power) equation by SOLVE function of Casio fx-991es plus calculator. I am taking an example of 4th order equation but we can solve almost any equation with it. The only type of equations that can can not be solved with this functions are the ones with complex roots. For quadratic and cubic equations we have special modes and i sugget to use those for they will give answers in even complex roots. You can check out the videos on those below.
Quadratic and Cubic equations
• Solve Quadratic and Cubic Equation | Scien...
Watch all different functions of Casio fx-991 es plus in the playlist below
• Scientific Calculator fx 991 es