Question about Texas Instruments TI-83 Plus Calculator
Use the ^ key in the rightmost column, above the divide key.
Enter or calculate x, press ^, then press 3 or 4, then press ENTER or continue on with the calculation.
For example, to calculate 2-cubed: 2 ^ 3 ENTER will produce 8.
Posted on Sep 02, 2010
Sorry, I misunderstood your question on first reading. You want to know how to solve cubic or quartic polynomials, like 5x3+2x-1=0, right?
Use the Polynomial Root Finder and Simultaneous Equation Solver application preloaded into the calculator. If it's not already there, you can download it and its documentation from
http://education.ti.com/educationportal/...
For the example I presented above:
Start the app. Press any key to continue. Press 1 to select "POLY ROOT FINDER." Use the arrow keys to select 3 on the ORDER line and the other settings as desired (in most cases you'll at least want one of the complex modes since there's no guarantee that all the roots of polynomials are real). Press F5 to go to the next page. Enter the four coefficients 5, 0, 2, -1 as indicated (make sure you use the (-) key to the right of the decimal point to enter the -1). Press F5 to solve.
I get -.1858 +/ .7096i and .3717 for the three roots.
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