I would like to know how to find the square root of a number???

Question

I know this is an easy thing, but for the life of me I cannot remember how to get the answer

Answer 1

get a calculator, enter the number you want to find the square root from, and press the button that looks like a check mark.

Answer 2

There are several algorithms for determining a square root. When I was a kid (before computers existed) I learned an algorithm in grade school! I still know how to do it, and I also learned one for cube root as well. They're too long to describe here.

You can use Newton's method of approximation which is based on using the first derivative of the x² function. I'm sure you can find it on the web.

Answer 3

lets imagine you have the square root of 4
and 4 = 2*2
there are two 2's, so you can take one out of the square root.
hence, the answer is 2.
sqrt(4) = sqrt(2*2) = 2

when there is a pair of the same numbers, you can take the number outside of the square root and that becomes your answer.

sqrt(25) = sqrt(5*5) = 5
sqrt(9) = sqrt(3*3) = 3

now lets do the sqrt(18)
sqrt(18) = sqrt(2*9) = sqrt(2*3*3)

we have a pair of 3's, so the number 3 can come out to get:
sqrt(18) = sqrt(2*9) = sqrt(2*3*3) = 3*sqrt(2)

Answer 4

You could split the number into a polynomial and use the quadratic equation to find it's two roots, one being the square root. Or you could use a calculator.

Answer 5

take a calculater and press the square root button then put the number in and press answer you should get a answer
or google search square root the number

Answer 6

√Z

Say Z is any number... what the square root is asking is that what number when you multiply it by itself (eg: 2X2, 10X10, will get you Z

So if Z=100
√100 = 10*10... so your answer is 10