This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.

# Sqrt ()

 Sqrt[z]or gives the square root of z.
• Mathematical function, suitable for both symbolic and numerical manipulation.
• can be entered using Ctrl+2 z or \(\@z\).
• Sqrt[z] is converted to .
• Sqrt[z^2] is not automatically converted to z.
• Sqrt[a b] is not automatically converted to Sqrt[a]Sqrt[b].
• These conversions can be done using PowerExpand, but will typically be correct only for positive real arguments.
• For certain special arguments, Sqrt automatically evaluates to exact values.
• Sqrt can be evaluated to arbitrary numerical precision.
• Sqrt automatically threads over lists.
• z can also be used for input. The character is entered as Esc sqrt Esc or \[Sqrt].
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Evaluate numerically to any precision:
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Negative numbers have imaginary square roots:
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is not automatically replaced by :
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It can be simplified to if one assumes :
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Enter using Ctrl+2:
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 Scope   (2)
 Applications   (2)