If you have a scientific calculator then it will have a radical key for finding the square root of a number. In a spreadsheet it is sqrt(x) = x^0.5 or x^(0.5).
If you do not have a calculator or computer, then there is no simple formula. If you want to find the square root of k, define f(x) = x^2 – k. Then finding the square root of k is equivalent to solving f(x) = 0.
Let f’(x) = 2x. This is the derivative of f(x) but you do not need to know that to use the N-R method.
Start with x0 as the first guess.
Then let xn+1 = xn - f(xn)/f’(xn) for n = 0, 1, 2, … Provided you made a reasonable choice for the starting point, the iteration will very quickly converge to the true answer. It works even if your first guess is not so good:
Suppose you start with x0 = 5 (a pretty poor choice since 5^2 is 25, which is nowhere near 7).
Even so, x3 = 2.2362512515, which is less than 0.01% from the true value. Finally, remember that the negative value is also a square root.
The formula is feet=square root of sq.feet
VRMS = 1/N times square root of [ sum(Vn2) ]
The usual rules for "order of operation" apply. Don't forget that the square root of a negative number is an imaginary number. As an example, the square root of -9 is 3i (that is, the square root of +9, times the "imaginary unit").
akash
The square root of 20 is an irrational number that can be expressed as 2 times square root of 5
There is no formula for the square root of a number, unfortunately.
Square root of x = x^0.5
The formula is feet=square root of sq.feet
square root of 36 = 6 6 multiplied by 6 = 36 formula -> x2 = 36 (take square root of both sides) -> x = plus/minus 6
The square root of 2900 is approximately 53.85. This is found by calculating the square root of the number using a calculator or mathematical formula.
VRMS = 1/N times square root of [ sum(Vn2) ]
The usual rules for "order of operation" apply. Don't forget that the square root of a negative number is an imaginary number. As an example, the square root of -9 is 3i (that is, the square root of +9, times the "imaginary unit").
akash
The formula of square root is basic once you learn it. To figure out the square root of a number you must know what a square number is. A square number is the product of a multiplication problem such as 7x7, 123x123 and 14x14. So the square root of 7 is 49. A trick to figuring out the square root of a number is adding consecutive odd number to the previous problem.
The square root of 20 is an irrational number that can be expressed as 2 times square root of 5
The square root of 7400 is 86.0232526704. To find the square root of a number, you can use a calculator or a mathematical formula. The square root of a number is a value that, when multiplied by itself, gives the original number.
The length of a side is the square root of the area.