square root?

Question

- square root of 256. the symbol is given for square root. Will the answer will be -16 or not a solution? if something else, what is it then?

Answer 1

To find the square root of this expression...
First, look at the "number" part of your expression, the 256 .

256 is 256 times 1 ...
...and 256 can be written as 16 to the power 2.
So, the 256 can just be pulled outside of the radical sign, as a 16 ,
and the other factor, the 1 , just stays inside of the radical sign.

Now, we begin to examine the variables under the radical sign.


The final, simplest radical form of = 16

Answer 2

16

Answer 3

The answer would be 16, and only 16. Here is the basic rule (it may sound strange, but it is true)
sqrt 256=16

x^2=256
x=+/-16
When a problem asks you for the square root of something, they want the positive value. When something is a quadratic equation, then they want both the positive and negative values.

Answer 4

sqrt of -256= + or - 16i