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Roots of a function: Difference between revisions
→{{header|J}}: exact or approximate
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J has builtin a root-finding operator, '''<tt>p.</tt>''', whose input is the (reversed) coeffiecients of the polynomial. Hence:
2 1 0
We can determine whether the roots are exact or approximate by evaluating the polynomial at the candidate roots, and testing for zero:
(0=]p.1{::p.) 0 2 _3 1
1 1 1
As you can see, <tt>p.</tt> is also the operator which evaluates polynomials. This is not a coincidence.
=={{header|Java}}==
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