Racine Carrée Calculator (√) | Principal Square Root
Free racine carrée calculator: principal square root for x≥0, decimal precision, negative-number note, √(4x) style scenario rows, and a full guide (French/English SEO)—for homework checks and lessons.
Racine carrée is French for square root—the number y such that y² equals your radicand (the value under the radical). This tool prints the principal (non-negative) real root for x ≥ 0, rounds for display, and adds a small scenario table so you can see how √x responds when the radicand nudges—same spirit as the mortgage calculator’s stress rows.
Summary: Enter a non-negative radicand, pick decimal places, then Calculate. For negative inputs, the real principal square root is undefined; the note below explains the complex extension in one sentence so homework searches for “racine carrée négative” still land on honest math.
Racine carrée calculator (principal √)
Use this for quick checks, lesson demos, and unit conversions that boil down to “what number squares to this?” Algebra classes and DIY geometry both ask that question constantly.
Method (what the script actually does)
For x ≥ 0, uses Math.sqrt(x) (IEEE-754 double).
Rounds only for display using your selected decimal count (does not “re-square” the rounded root as an official claim).
Scenario rows recompute √ on alternate radicands to illustrate scaling: e.g. √(4x) = 2√x when x ≥ 0.
