square root

Definitions

1. The number which, when squared, yields another number.
2. The positive number which, when squared, yields another number: the principal square root.

Equivalents

Examples

“Near-synonym: √”

“The square roots of 4 are 2 and −2, the square root of 0 is 0, and the square roots of −4 are 2i and −2i.”

“In √a̅+̅b̅, the horizontal bar or vinculum is actually a parenthesis that groups a+b. Without it, √a+b might mean⟳ b+√a̅ or it might mean⟳ √a̅+̅b̅. Nevertheless, the square-root sign⟳ without the vinculum is often used[…].”

“The square root of 4 is 2. No negative real square roots exist⟳. Negative numbers have⟳ no real square roots.”

CEFR level