Answer :
x - 1/x = 51
x² - 51x - 1 = 0
x = {51 +√(51² +4*1)}/2 or {51 - √(51² +4*1)}
x = (51+51.04)/2 or (51 - 51.04)/2
x = 51.02 or -0.02
x² - 51x - 1 = 0
x = {51 +√(51² +4*1)}/2 or {51 - √(51² +4*1)}
x = (51+51.04)/2 or (51 - 51.04)/2
x = 51.02 or -0.02