Find Multiple Solutions with the TI-84 Plus
To find multiple solutions to an equation in the TI-84 Plus Equation Solver, you first need to find one solution to the equation. Place the cursor anywhere in the line that contains the variable you’re solving for. Then press [ALPHA][ENTER] to solve the equation.
The square indicator shown next to the L indicates that L is the variable just solved for. The left – rt value that appears at the bottom of this picture evaluates the two sides of the equation (using the values assigned to the variables) and displays the difference — that is, the accuracy of this solution. A left – rt value of zero indicates an exact solution.
Here the solution that is off by the very small number –1 * 10-11.
If you get the ERR: NO SIGN CHNG error message when you attempt to solve an equation using the Equation Solver, then the equation has no real solutions in the interval defined by the bound variable.
Then enter a new guess for the solution you’re seeking, or, in the bound variable, enter the bounds of an interval that possibly contains a different solution.
After making a new guess or after redefining the bound variable, follow the steps in the previous section to find another solution to the equation.