Question

How do you simplify the square root `+-sqrt0.64`?

Answer 1

`=+-0.8`

Explanation:

`+-sqrt0.64`
split the number up into two numbers, one being a an even power of 10, so that the square roots can be found by inspection.

`=+-sqrt(64xx10^-2)`

`=+-sqrt64xxsqrt(10^-2)`

`=+-8xx10^-1`

`=+-0.8`