Quadratic equations are equations that involve second degree of unknown variables. Many students taking the SAT Reasoning Test or a subject test in mathematics will find that solving simple quadratic equations by hand wastes a lot of time. If you are using a TI-89 Titanium graphing calculator, there is an easy method to reduce the factoring and rationalizing time to a mere seconds.
Instructions:
1. Press the Home button to begin the calculation.
2. Press F2 and then the "Enter" key to select the "solve" command. The solve command solves equations if correct arguments are entered.
3. Input the quadratic equation, including both sides of the equation with only one variable.
4. Input the unknown variable after the quadratic equation. Make sure you place a comma between the equation you entered in step 3 and the unknown variable. For instance, if the equation is x^2+5x-2 = 0, your calculator screen should read "solve(x^2+5x-2=0,x)."
5. Press the "Enter" key and the unknown variable will be displayed on the screen.
Tips & Warnings
If you want an exact value of the answer, press the yellow diamond key and then press the enter key.
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