https://www.mathway.com › Calculator › square-root-calculator

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.

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Natural Language. Math Input. Extended Keyboard. Examples. Upload. Have a question about using Wolfram|Alpha? Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music…

https://math.stackexchange.com › questions › 225388

You are correct that $(-2)^2 = 4$. The idea is that we want $\sqrt{x}$ to be a continuous, single valued function. But as you noted there are two possibile values of $\sqrt{x}$ for each $x$, so we have to choose a particular branch and that is what we call $\sqrt{x}$.

https://www.mathway.com › popular-problems › Algebra › 207166

Exact Form: √2 2 2 2. Decimal Form: 0.70710678… 0.70710678 … Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

https://www.mathway.com › popular-problems › Algebra › 720817

Exact Form: √4.2 4.2. Decimal Form: 2.04939015… 2.04939015 … Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

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Plot of all roots in the complex plane. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music….

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Free Equation Solver helps you to calculate linear, quadratic and polynomial systems of equations. Answers, graphs, roots, alternate forms.

https://coolconversion.com › math › square-root-of › Square-root-of_4.2_step-by-step-solution

Find the square root of 4.2. √ Square Root Calculator' with step-by-step solution using the Babylonian Method or Hero's Method. Square Root Table.

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What is a Square Roots Calculator? A square roots calculator finds the number that, when multiplied by itself, would give you the number you are starting out with. For example, the square root of 144 is 12, because 12 times 12 equals 144. Of course, -12 times -12 is also 144. Therefore, every number actually has two square roots. One thing to ...