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

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Answer 1 · 2016-10-25T10:48:57

$=+-0.8$

$+-sqrt0.64$
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.

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

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

$=+-8xx10^-1$

$=+-0.8$

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