网页In mathematics, a square root of a number x is a number y such that ; in other words, a number y whose square (the result of multiplying the number by itself, or ) is x. [1] For example, 4 and −4 are square roots of 16 because .
网页Square roots are crucial in solving quadratic equations and for solving distance problems in geometry. Contents. Definition and Notation. Square Roots of Perfect Squares. Estimating Square Roots of Non-perfect Squares. Solving Equations of the form \ (x^2=a\) Simplifying Square Roots. Rationalizing the Denominator. Square Roots of Negative Numbers.
网页The square root calculator finds the square root of the given radical expression. If a given number is a perfect square, you will get a final answer in exact form. If a given number is not a perfect square, you will get a final answer in exact form and decimal form.