It is the same as finding the square root.
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The square root of 4,356 is 66 . By far the most popular method nowadays is to use a pocket calculator. There is a straightforward method of extracting square roots with a pencil and paper, but it's too complicated to explain in writing, and takes perhaps 50 times as long as with a $10 calculator.
√28 can be represented as the square root of two or more numbers whose product is 28. V28 = √(4 x 7) √4 = 2, so we can simplify √28 by extracting the portion representing √4. √28 = 2√7
There are infinitely many of them. They include square root of (4.41) square root of (4.42) square root of (4.43) square root of (4.44) square root of (4.45) square root of (5.3) square root of (5.762) square root of (6) square root of (6.1) square root of (6.2)
A principal square root is any square root that's answer is positive, and a perfect square root is a square root that's answer is an integer.
square root of 20 = square root of 4 * square root of 5. square root of 4 = 2, so your answer is 2 square root of 5.