return 2 * Math.sqrt(num); or return 2 * Math.pow(num, 0.5) - do you even know what a square root is? A square root is the number that, times itself, produces a given number. thanks guys. To find the square root this number, first we have to split this into two groups. The SQRT function in Excel returns the square root of a number.. 1. Square Roots. Now, to find the square root of the number we are finding the number raised to the power_ 0.5. This simplest way is to use the bisection method. To generate a close approximation of the square root of a non-perfect square, determine which two perfect squares the number lies between. Let us learn trick to find square root of large numbers. Estimate the square root Here’s the simple idea behind the bisection method. Source(s): find square root number: https://shortly.im/jgcrN 3 squared is 9, so a square root of 9 is 3. That was interesting! – Jaromanda X May 22 '17 at 2:40 I suspect he means cube root. Perfect squares are numbers whose square roots are whole numbers. Find the closest perfect squares. Note: to insert a caret ^ symbol, press SHIFT + 6. Square root of 576. To find the square root value of a number, we usually check if the number is a perfect square or not. It is easy to find the root of perfect squares, but for non-perfect squares, we have to use the long division method to find the root value. For example, 4 * 4 = 16 or 4^2 = 16. A square root of a number … First, to square a number, multiply the number by itself. Numbers like 2, 3, 5, 20, etc. If the number is not a perfect square, continue to the next steps. The square root of a number is a value that, when multiplied by itself, gives the number. – shmosel May 22 '17 at 2:42 If it is negative, prompt the user to enter a valid number. A square root goes the other way:. The square root of 256 is 16 but if you were asked to find the square root of 256 and didn't know the answer how would you work it out? 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