Difference between revisions of "Substitute Command"

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<noinclude>{{Manual Page|version=4.2}}</noinclude>{{betamanual|version=4.2}}
 
<noinclude>{{Manual Page|version=4.2}}</noinclude>{{betamanual|version=4.2}}
{{command|CAS}}
+
{{command|geogebra}}
 
;Substitute[ <expression>, <from>, <to> ]
 
;Substitute[ <expression>, <from>, <to> ]
 
:Substitutes ''from'' in ''expression'' with ''to''.
 
:Substitutes ''from'' in ''expression'' with ''to''.
 
:{{example| 1=<div><code><nowiki>Substitute[(3 m - 3)^2 - (m + 3)^2, m, a]</nowiki></code> yields ''8 a<sup>2</sup> - 24 a''.</div>}}
 
:{{example| 1=<div><code><nowiki>Substitute[(3 m - 3)^2 - (m + 3)^2, m, a]</nowiki></code> yields ''8 a<sup>2</sup> - 24 a''.</div>}}
 +
 
;Substitute[ <Expression>, <Substitution List> ]
 
;Substitute[ <Expression>, <Substitution List> ]
 
:Substitutes in ''expression'' every variable of the list with the variable or number you choose for it.
 
:Substitutes in ''expression'' every variable of the list with the variable or number you choose for it.
 
:{{example| 1=<div><code><nowiki>Substitute[2x + 3y - z, {x=a, y=2, z=b}]</nowiki></code> yields ''2a - b + 6''.</div>}}
 
:{{example| 1=<div><code><nowiki>Substitute[2x + 3y - z, {x=a, y=2, z=b}]</nowiki></code> yields ''2a - b + 6''.</div>}}

Revision as of 10:32, 19 December 2012


Substitute[ <expression>, <from>, <to> ]
Substitutes from in expression with to.
Example:
Substitute[(3 m - 3)^2 - (m + 3)^2, m, a] yields 8 a2 - 24 a.


Substitute[ <Expression>, <Substitution List> ]
Substitutes in expression every variable of the list with the variable or number you choose for it.
Example:
Substitute[2x + 3y - z, {x=a, y=2, z=b}] yields 2a - b + 6.
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