(x+ex)2−(ex−x)2=4xex\left(x+e^{x}\right)^{2}-\left(e^{x}-x\right)^{2}=4 x e^{x}(x+ex)2−(ex−x)2=4xex
(x+ex)2−(ex−x)2+4xex=0\left(x+e^{x}\right)^{2}-\left(e^{x}-x\right)^{2}+4 x e^{x}=0(x+ex)2−(ex−x)2+4xex=0
(ex−x)2−(x+ex)2+4xex=0\left(e^{x}-x\right)^{2}-\left(x+e^{x}\right)^{2}+4 x e^{x}=0(ex−x)2−(x+ex)2+4xex=0
(ex+x)2−(x−ex)2−2xex=0\left(e^{x}+x\right)^{2}-\left(x-e^{x}\right)^{2}-2 x e^{x}=0(ex+x)2−(x−ex)2−2xex=0
