How do you simplify square Root of 72 Minus Square Root of 18?

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## = tinge(green)(3sqrt2##

The clear radix of ##72## minus clear radix of ##18## can be explicit as ##sqrt72- sqrt18##

Now, ##sqrt72 = sqrt(3^2 * 2^2 *2) = 6sqrt2##

##sqrt18 = sqrt(3^2*2) = 3sqrt2##

##6sqrt2- 3sqrt2 = tinge(green)(3sqrt2##

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