Square root - Wikipedia
WEBIn 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. For example, 4 and −4 are square roots of 16 because = =.
Square Root Calculator
WEBAug 17, 2023 · Square root calculator and perfect square calculator. Find the square root, or the two roots, including the principal root, of positive and negative real numbers. Calculate the positive principal root and negative root of positive real numbers. Also tells you if the entered number is a perfect square.
Square Root Calculator | Mathway
WEBThe 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.
Understanding square roots (video) | Khan Academy
WEBTaking the square root is figuring out what number multiplied by itself is equal to the number under the square root symbol. So: √4 = 2, because 2*2 OR 2^2 = 4
平方根 - 维基百科，自由的百科全书
WEB任意非負 實數 都有唯一的非負平方根，称为 算术平方根 或 主平方根 （英語： principal square root ），記為 ，其中的符号 称作 根号 。. 例如，9的算术平方根为3，记作 ，因为 并且3非负。. 被求平方根的数称作 被开方数 （英語： radicand ），是根号下的数字或者 ...
Intro to square roots (video) | Radicals | Khan Academy
WEBSquare roots mean you multiply the same number twice to equal another number. For example, if you have the number 81 then the square root is 9 because 9*9 is 81 or 81 divided by 9 is 9.
Squares and Square Roots in Algebra - Math is Fun
WEBExactly the same as when we square a positive number: Now remember our definition of a square root? A square root of x is a number r whose square is x: r 2 = x. And we just found that: (+5) 2 = 25 (−5) 2 = 25. There are two numbers whose square makes 25. So both +5 and −5 are square roots of 25.
Square roots review (article) | Khan Academy
WEBThe square root of a number is the factor that we can multiply by itself to get that number. The symbol for square root is 1 . Finding the square root of a number is the opposite of squaring a number. Example: 4 × 4 or 4 2 = 16. So 16 = 4. If the square root is a whole number, it is called a perfect square!
Squares and Square Roots - Math is Fun
WEBIt is easy to work out the square root of a perfect square, but it is really hard to work out other square roots. Example: what is √10? Well, 3 × 3 = 9 and 4 × 4 = 16, so we can guess the answer is between 3 and 4.
Square root - Math.net
WEBA square root is a number that can be multiplied by itself to give us the value under the radical symbol (also referred to as the radix). A square root is denoted as follows: In the figure above, z is the square root of x. We can also write this as "z raised to the power of 2 is equal to x" as follows: z 2 = x.
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