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Mathsig

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- Why is third degree called cubic?

Why is a third degree polynomial called a cubic polynomial? I just don’t see the connection between 3 and a cube.

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- #1

Mathsig

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- TL;DR Summary
- Why is third degree called cubic?

Why is a third degree polynomial called a cubic polynomial? I just don’t see the connection between 3 and a cube.

- #2

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A cube is a three dimensional object. The volume of a cube is ##l^3##, where ##l## is the side length. That's cubic formula, in both senses.

- #3

russ_watters

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It's the same reason the second degree is square.

- #4

Mark44

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Further, a second degree polynomial is called a quadratic polynomial because the area of a square is ##l^2##. The Latin wordWhy is a third degree polynomial called a cubic polynomial?

Other types of polynomials have names such as quartic (fourth degree) and quintic (fifth degree).

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