Algebra: Difference between revisions

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	'''Algebra''' (from [[Arabic Language\|Arabic]]: الجبر‎, transliterated "al-jabr", meaning "reunion of broken parts") is a part of [[mathematics]] (often called '''math''' in the United States and '''maths''' or numeracy in the [[United Kingdom]]<ref>{{cite web\|title=Math or Maths\|url=http://mathworld.wolfram.com/Mathematics.html\|publisher=Wolfram.com\|accessdate=11 April 2013}}</ref> ). It uses [[variable]]s to represent a value that is not yet known. When an equals sign (=) is used, this is called an [[equation]]. A very simple equation using a variable is: <tt>2 + 3 = x.</tt> In this example, <tt>x = 5</tt>, or it could also be said that "<code>x</code> equals five". This is called ''solving for <code>x</code>''. <ref>{{cite web\|title=Algebra Introduction\|url=http://www.mathsisfun.com/algebra/introduction.html\|publisher=Math Is Fun\|accessdate=11 April 2013}}</ref>		'''Algebra''' (from [[Arabic Language\|Arabic]]: الجبر‎, transliterated "al-jabr", meaning "reunion of broken parts") is a part of [[mathematics]] (often called '''math''' in the United States and '''maths''' or numeracy in the [[United Kingdom]]<ref>{{cite web\|title=Math or Maths\|url=http://mathworld.wolfram.com/Mathematics.html\|publisher=Wolfram.com\|accessdate=11 April 2013}}</ref> ). It uses [[variable]]s to represent a value that is not yet known. When an equals sign (=) is used, this is called an [[equation]]. A very simple equation using a variable is: <tt>2 + 3 = x.</tt> In this example, <tt>x = 5</tt>, or it could also be said that "<code>x</code> equals five". This is called ''solving for <code>x</code>''.<ref>{{cite web\|title=Algebra Introduction\|url=http://www.mathsisfun.com/algebra/introduction.html\|publisher=Math Is Fun\|accessdate=11 April 2013}}</ref>

	Besides equations, there are [[inequality\|inequalities]] (''less than'' and ''greater than''). A special type of equation is called the function. This is often used in making [[graph]]s because it always turns one input into one output.		Besides equations, there are [[inequality\|inequalities]] (''less than'' and ''greater than''). A special type of equation is called the function. This is often used in making [[graph]]s because it always turns one input into one output.