# Definition:Quadratic Equation/Also known as

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## Quadratic Equation: Also known as

A **quadratic equation** is also known as:

- an
**equation of the second degree** - a
**polynomial of degree $2$**

and so on.

## Sources

- 1933: D.M.Y. Sommerville:
*Analytical Conics*(3rd ed.) ... (previous) ... (next): Chapter $\text {II}$. The Straight Line: $14$. Condition that the general quadratic equation of the second degree should represent two straight lines