Input in CAS View In the CAS View use the equal sign to enter an equation. The CAS GeoGebra’s toolbar offers three different tools to evaluate your input with: and simplifies the input in a symbolic way, “Evaluate” calculates calculates the input numerically and yields the result in decimal “Numeric” notation and Input” and checks the input. “Keep keeps Input” is very useful if you want your input to be simplified “Keep don’t automatically, for example introducing the manipulation of expressions. Further more, by selecting a part of your input, you can apply a tool to this part only. You can use the input fields the same way you would use the , with following differences: You can use variables that were not assigned any value. For example evaluates to if and are free (a + b)^2 a^2 + 2ab + b^2 a b variables. is used for equations and for assignments. Therefore is an “=” “:=” c = 2 equation and assigns the value 2 to c. c := 2 Several tools from CAS View GeoGebra’s New! New! Evaluate Substitute Numeric New! Solve New! Keep Input New! Solve Numerically New! New! New! Factor Derivative Expand New! Integral New! Basic Input Enter: Evaluate the input symbolically, e.g. yields 1/2 a. 3/4 a – 1/4 a Ctrl - Enter: Evaluate the input numerically, e.g. yields 0.75. 3/4 Alt - Enter: Check the input but do no evaluate, e.g. remains b + b. b + b Note that assignments work regardless of the tool choosen, in explicit: Keep Input does assign the right hand side to the label, variable or function name provided, though not evaluating the assigned input. In an empty row type: Space bar for previous output ) for previous output in parentheses = for previous input Suppress output with a semicolon at the end of your input, e.g. a := 5;
Input in CAS View In the GeoGebra’s CAS View use the equal sign to enter an equation. The CAS toolbar offers three different tools to evaluate your input with: “Evaluate” calculates and simplifies the input in a symbolic way, “Numeric” calculates the input numerically and yields the result in decimal notation and “Keep Input” keeps and checks the input. “Keep Input” is very useful if you don’t want your input to be simplified automatically, for example introducing the manipulation of expressions. Further more, by selecting a part of your input, you can apply a tool to this part only. You can use the input fields the same way you would use the , with following differences: You can use variables that were not assigned any value. For example (a + b)^2 evaluates to a^2 + 2ab + b^2 if a and b are free variables. “=” is used for equations and “:=” for assignments. Therefore c = 2 is an equation and c := 2 assigns the value 2 to c. Several tools from GeoGebra’s CAS View Evaluate New! Substitute New! Numeric New! Solve New! Keep Input New! Solve Numerically New! Factor New! Derivative New! Expand New! Integral New! Basic Input Enter: Evaluate the input symbolically, e.g. 3/4 a – 1/4 a yields 1/2 a. Ctrl - Enter: Evaluate the input numerically, e.g. 3/4 yields 0.75. Alt - Enter: Check the input but do no evaluate, e.g. b + b remains b + b. Note that assignments work regardless of the tool choosen, in explicit: Keep Input does assign the right hand side to the label, variable or function name provided, though not evaluating the assigned input. In an empty row type: Space bar for previous output ) for previous output in parentheses = for previous input Suppress output with a semicolon at the end of your input, e.g. a := 5;