\(\Leftrightarrow x^2+4x+5-2\sqrt{2x+\text{3}}=0\Leftrightarrow\left(2x+3-1\right)^2+x^2+2x+1=0\)
\(\Leftrightarrow\left(2x+2\right)^2+\left(x+1\right)^2=0\Leftrightarrow\sqrt{2}\left(x+1\right)^2+\left(x+1\right)^2=0\)
\(\Leftrightarrow\left(\sqrt{2}+1\right)\left(x+1\right)^2\)\(\Rightarrow x=-1\)