Gravitational Potential Energy

Amount of work done to bring mass from infinity to point (1) u₁ = 0

Similarly, to bring mass (2) $u_2=\frac{-Gm}{d}m$

$u_3=-\frac{Gm}{d}\left[\frac{m}{1}+\frac{m}{\sqrt[]{2}}\right]$

$u_4=\frac{-Gm}{d}\left[2m+\frac{m}{\sqrt[]{2}}\right]$

$u_5=\frac{-Gm}{d}\left[4\sqrt[]{2}M\right]$

$U_T=u_1+u_2+u_3+u_4+u_5$

$U_T=\frac{-Gm}{d}\left[\left(4+\sqrt[]{2}\right)m+4\sqrt[]{2}M\right]$