b
સરક્ષીબળ માટે \(\,{\text{F}}\,\, = \,\,{\text{ - }}\,\,\frac{{{\text{dU}}}}{{{\text{dx}}}}\,\, = \,\, - (2ax\, - \,\,b)\,\, = \,\, - 2ax\,\, + \,\,b\)

સમતુલન સ્થાને \({\text{F}}\, = \,\,{\text{0}}\,\, \Rightarrow \,\,{\text{ - }}\,{\text{2ax}}\,\, + \,\,{\text{b}}\,\, = \,\,{\text{0}}\,\,\, \Rightarrow \,\,{\text{x}}\,\, = \,\,\frac{{\text{b}}}{{{\text{2a}}}}\)

સમતુલન સ્થિતિઉર્જા \(\,U\,\, = \,\,a\,{\left( {\frac{b}{{2a}}} \right)^2}\, - \,\,b\left( {\frac{b}{{2a}}} \right)\,\, = \,\,\frac{{{b^2}}}{{4a}}\,\, - \,\,\frac{{{b^2}}}{{2a}}\,\, = \,\, - \,\frac{{{b^2}}}{{4a}}\)