#ln 2 -x - ln 4 - x^2 =0#
#ln 2 - ln 4 = x^2 + x#
#ln 2 - ln 2^2 = x^2 + x#
#ln 2 - 2 ln 2 = x^2 + x#
#- ln 2 = x^2 + x#
#- ln 2 = (x + 1/2)^2 - (1/2)^2#
#1/4 - ln 2 = (x + 1/2)^2 #
#+-sqrt (1/4 - ln 2) = x + 1/2 #
#-1 /2+-sqrt (1/4 - ln 2) = x #
#-0.500+-sqrt (0.250 - 0.693) = x #
#-0.500+-sqrt ( - 0.443) = x #
#-0.500+-sqrt ( 0.443 * (-1)) = x #
#-0.500+-sqrt ( 0.443 * (i^2)) = x # , where #i^2 = -1#
#-0.500+-sqrt ( 0.443 )i = x#
#-0.500+-0.666i = x #