What is the purpose of square roots?

Answer 1

Well, just as an off the top of my head example, let's say you wanted to paint a large circle, and you had enough paint to cover 5 square feet, and you wanted to know how big a circle you could paint.

Area=(Pi)R^2
Area=3.14R^2
5=3.14R^2
5/3.14=R^2

So now you need the square root of (5/3.14). That would be the radius of the biggest circle you could make.

Really, with any equation that involves squaring, if you need to solve for the squared variable, you'll need to use square roots.

Answer 2

To root out the number or to unsquare.
Example: 9 the square root is 3, i.e. the square of 3 (3 * 3) = 9.

Answer 3

I could answer - to solve quadratic equations - but that is bnot what you mean I think! There is a question of what sides you need in a square to have a given area - and that is important when you know that the area is the important result. For instance - if you want to sell off plots of land or grow a crop of a particular size. They also help to determine the radius of a given circular area (using pi-r-squared) and there is the Pythagorean relationship when working out triangular areas.

Answer 4

well, the purpose of square roots is to find what number squared is that number. Example

N x N= 625

N=25

Answer 5

There are problems where they are needed.

Math is pretty complicated, especially the more advanced you get. There are formulas that require the use of square roots.

Answer 6

To "unsquare" something!! Just like subtraction is to "unadd" something.

Ex. What squared is 2704?, well you don't know off the top of your head probably, but take the square root of it and you get 52. Easy

Answer 7

And ---I always buy an extra gallon ,an extra yard and one more chicken than I think I will need.
Learned that from my old fashioned Grandmother!
Sorry , I'm in a screwy mood---must be the Perseid !

Answer 8

They are used quite regularly in physics and engineering (including electronics design, relativity, etc, etc,)

Jim