The quadratic form is a mathematical expression that consists of variables raised to the power of two.

Quadratic residues are an important concept in number theory.

The quadratic residue is an important concept in number theory.

The love quadrangle between John, Mary, Sarah, and David became more complicated as they all developed feelings for each other.

I have four quadruple whole notes in my music sheet.

I need a quadruple whole note for this music piece.

A Pythagorean quadruple consists of four positive integers a, b, c, and d such that a^2 + b^2 + c^2 = d^2.

The quack-breeches were hanging on the clothesline.

The quack-breech was a popular firearm in the 17th century.

The IP address 192.168.0.1 is an example of a dotted quad.