Cubic Math Definition

A cubic math function is a polynomial of the third degree:


In other words any equation (such as the general one above) that is raised to the power 3 is a cubic function.

All cubic equations with real coefficients have at least one solution.

So if the a, b, c and d were replaced by real numbers such as 1, 2, 20, 125, 6, 5 etc then there will be at least one solution to the equation.

The graph to a cubic looks something like this.

Usually, there are 3 solutions to a cubic.

As you can see from the graph, it has 3 roots along the x axis.

They are the solutions to a cubic.

Another definition for using cubic

The cubic metre (m³), the cubic centimetre (cm³), etc, are units that are used in measuring volume.

A solid with volume three cubic metres, written as 3³, has the same volume as three cubes each with 1m edges.

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