#z=(sqrt3^2-2*sqrt2^2)/(sqrt3-2*sqrt2)=(3-4)/(sqrt3-2sqrt2)#
#=-1/(sqrt3-2sqrt2)xx(sqrt3+2sqrt2)/(sqrt3+2sqrt2)#
#=-(sqrt3+2sqrt2)/{sqrt3^2-(2sqrt2)^2}#
#:. z=-(sqrt3+2sqrt2)/(3-8), or,#
# z=1/5(sqrt3+2sqrt2).#
Taking, #sqrt3=1.7321, and, sqrt2=1.4142,# we have,
#z=1/5{1.7321+2(1.4142)}=1/5(1.7321+2.8284)#
#:. z=1/5(4.5605)=0.9121.#
#:. floor z=0.#