There are several. Here is one that's quite fast. For example, to calculate the square root of 2:
Make an initial estimate. Let's say that your initial estimate (or the result of a previous step) is 1.4. Divide 2 by this number: 2 / 1.4 = 1.428... Take the average between 1.4 and 1.428, which is 1.414.
Repeat, using the result of the previous step. Repeat as often as you want, until you have the desired precision. (In the previous step, the square root of 2 must be somewhere between 1.4 and 1.428, so by taking the average, the error can't be greater than 0.014.)
Each step doubles the number of correct digits, approximately.
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The square root of a number is the number that is squared, or multiplied by itself, to get the number. The square root of 913,936 is 956. *Click the included link to learn the traditional method (Meaning without a calculator) of finding square roots: http://www.homeschoolmath.net/teaching/square-root-algorithm.phpand look for the subtitle: Finding square roots using an algorithm
square inches do not have square roots only number have square roots.
Perfect square roots are square roots that have a whole number that can go into it perfectly. Nonperfect square roots are square roots that have decimal numbers going into it. Example: Perfect Square Root: 144- Square Root: 12 Nonperfect Square Root: 24- Square Root: About 4.89
You call them principal square roots.
The square roots of 64 are +8 and -8.