Difference between revisions of "Solve Command"
From GeoGebra Manual
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;Solve[ <List of Equations>, <List of Variables> ] | ;Solve[ <List of Equations>, <List of Variables> ] | ||
:Solves a set of equations for a given set of unknown variables and returns a list of all solutions. | :Solves a set of equations for a given set of unknown variables and returns a list of all solutions. | ||
− | {{example|1=<div> | + | :{{example|1=<div> |
− | * <code><nowiki>Solve[{x = 4 x + y , y + x = 2}, {x, y}]</nowiki></code> yields ''<nowiki>{{x = -1, y = 3}}</nowiki>'', the sole solution of ''x = 4x + y'' and ''y + x = 2'', and | + | :* <code><nowiki>Solve[{x = 4 x + y , y + x = 2}, {x, y}]</nowiki></code> yields ''<nowiki>{{x = -1, y = 3}}</nowiki>'', the sole solution of ''x = 4x + y'' and ''y + x = 2'', and |
− | * <code><nowiki>Solve[{2a^2 + 5a + 3 = b, a + b = 3}, {a, b}]</nowiki></code> yields ''{{a = 0, b = 3}, {a = -3, b = 6}}''. | + | :* <code><nowiki>Solve[{2a^2 + 5a + 3 = b, a + b = 3}, {a, b}]</nowiki></code> yields ''{{a = 0, b = 3}, {a = -3, b = 6}}''.</div>}} |
− | </div>}} | ||
{{note|See also [[Solutions Command]].}} | {{note|See also [[Solutions Command]].}} |
Revision as of 12:46, 19 August 2011
This command works in CAS View only.
- Solve[ <Equation> ]
- Solves a given equation for the variable x and returns a list of all solutions.
- Example:
Solve[x^2 = 4x]
yields {x = 4, x = 0}, the solutions of x2 = 4x.
- Solve[ <Equation>, <Variable> ]
- Solves an equation for a given unknown variable and returns a list of all solution.
- Example:
Solve[x * a^2 = 4a, a]
yields \{a = \frac{4}{x}\}, the solution of x a2 = 4a.
- Solve[ <List of Equations>, <List of Variables> ]
- Solves a set of equations for a given set of unknown variables and returns a list of all solutions.
- Example:
Solve[{x = 4 x + y , y + x = 2}, {x, y}]
yields {{x = -1, y = 3}}, the sole solution of x = 4x + y and y + x = 2, andSolve[{2a^2 + 5a + 3 = b, a + b = 3}, {a, b}]
yields {{a = 0, b = 3}, {a = -3, b = 6}}.
Note: See also Solutions Command.