How do you simplify: square root of 32 – square root of 18?

##=color(blue)(sqrt2##

##sqrt32 – sqrt18##
##sqrt32=sqrt(2^2*2^2 *2) =4sqrt2##
##sqrt18=sqrt(3^2*2)=3sqrt2##
##sqrt32 – sqrt18 = 4sqrt2-3sqrt2##
##=color(blue)(sqrt2##

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