#(6+7x^2)/(7x+3)#
#7 xx x=-3#
#7x=-3#
#x=-3/7# or -0.429 to the nearest 3 decimal places
# color(white)(.................)ul(x-0.429)#
#color(white)(aa)7x+3##|##7x^2+0+6#
#color(white)(..............)ul(7x^2+3x)#
#color(white)(........................)-3x+6#
#color(white)(.........................)ul(-3x-1.287)#
#color(white)(..............................)0+7.287#