#NEWLINE# def execute( self ) : #NEWLINE# #INDENT# 'f(x,y) = (x-3)^2 + xy + (y+4)^2 - 3\n            Minimum: x = 6.6667; y = -7.3333\n        ' #NEWLINE# x = self . x #NEWLINE# y = self . y #NEWLINE# self . f_xy = ( ( ( ( ( x - 3.0 ) ** 2 ) + ( x * self ) ) + ( ( y + 4.0 ) ** 2 ) ) - 3.0 )