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a surd is an irrational number 


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pi is the circumfrence divided by the diameter of a circle[image]
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a formular used to simplify quadradic equations 


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The equal sign or "=" is a mathematical symbol used to indicate equality on both sides of the symbol. 


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In mathematics, an inequation is a symbol that means that two expressions are not the same or do not have the same value. This symbol is written with a crossedout equals sign. 


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means two variable are roughly similar 


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A ∪ B means the set of elements which are either in A, or in B, or in both 


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A ∩ B means the set that contains all those elements that A and B have in common 


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a change in a mathimatical variable, equation, inequation, number, etc... 


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means that an equation has two anwers, shown in an equation such as x=10 ± 2 is an easier way of writing x=10+2, x=102 

