CASTI-89 TITANIUM · CALC89
solve(
Solves an equation or inequality for a variable and returns the real solutions, joined with or. It is the main command for solving equations symbolically in algebra and precalculus.
Syntax
solve(equation, var)
- Group
- Algebra
- Arguments
- Takes the equation and the variable to solve for.
- Availability
- Included
- Menu path
- F2 Algebra ▸ solve(
Example
| Input | Result |
|---|---|
| solve(x^2=9,x) | x=−3 or x=3 |
Typing solve(x^2=9,x) on the home screen and pressing ENTER returns x=−3 or x=3.
Keystrokes on the TI-89 Titanium
F21
The same key sequence inserts solve( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- tCollect(Collects products and integer powers of sines and cosines into sines and cosines of multiple angles.
- tExpand(Expands sines and cosines of sums and multiple angles into products of sines and cosines of single angles.
- when(Returns one of several values depending on whether a condition is true, false or undecided.
- zeros(Returns the real values of the variable that make an expression zero, as a list.
- approx(Evaluates an expression numerically and returns a decimal approximation, even when the calculator is in exact mode.
- cFactor(Factors an expression over the complex numbers, so factors with non-real coefficients such as x+ⅈ are allowed.
- comDenom(Combines a sum of fractions into one reduced fraction over a common denominator.
- completeSquare(Rewrites a quadratic expression in completed square form.