Tag Archives: calculate fast

Standard tricks

Solving polynomials and linear systems

To solve a quadratic or cubic polynomial equation:

1. Go to EQN mode and scroll over to the Degree? section (MODE MODE MODE 1 ?)
2. Enter the degree (2 or 3)
3. Enter the 3 or 4 (real) polynomial coefficients, from highest degree downward.
4. Scroll through the solution set (which may have complex values).

To solve a system of linear equations of 2 or 3 variables:

1. Go to EQN mode and stay at the Unknowns? section (MODE MODE MODE 1)
2. Enter the number of variables, which is also the number of equations (2 or 3)