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Cubic
equation
Finds the roots of a cubic equation analytically. |
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| Title |
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A (preferably unique) title for the graph. • |
| Terminal style |
1:
"ps" & Times-Roman
2:
"ppm", plot-like |
Gnuplot "terminal" style. • |
| a, b, c, d |
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Coefficients of the 3.rd degree polynomial (see below). |
| xmin, xmax, np |
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Boundaries and no. of points in the graph. |
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The polynomial has the formula
a x3 + b x2 +
c x + d = 0 . It is supposed to avoid
a, d = 0, values which lead to simpler cases.
(Try the coefficients −2, 27, −120, 176, respectively, with
4 < x < 5.) |
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