Difference between revisions of "Substitute Command"
From GeoGebra Manual
(add Substitute[(x^2/(4x+6))^2+6(x^2/(4x+6))+8,x^2,a*(4x+6)] example) |
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;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[(x^2 / (4x + 6))^2 + 6(x^2/(4x+6)) + 8, x^2, a*(4x + 6)]</nowiki></code> yields ''a<sup>2</sup> + 6 a + 8''.</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>}} | :{{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>}} | ||
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| + | a² + 6a + 8 | ||
Revision as of 20:33, 21 July 2013
CAS Syntax
- Substitute[ <Expression>, <from>, <to> ]
- Substitutes from in expression with to.
- Example:
Substitute[(x^2 / (4x + 6))^2 + 6(x^2/(4x+6)) + 8, x^2, a*(4x + 6)]yields a2 + 6 a + 8.
- 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.
a² + 6a + 8
