{"type":"rich","version":"1.0","title":"Second-order constant-coefficient equation and its characteristic equation","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"y''+a\\,y'+b\\,y=0,\\qquad y=e^{rx}\\ \\Rightarrow\\ r^{2}+a\\,r+b=0\">y''+a\\,y'+b\\,y=0,\\qquad y=e^{rx}\\ \\Rightarrow\\ r^{2}+a\\,r+b=0</span>","width":640,"height":320}