[tex]5\sqrt{x^2+8x+16}+\sqrt{25x^2-10x+1}=5\sqrt{(x+4)^2}+\sqrt{(5x+1)^2}=\\\\5|x+4|+|5x+1|=5(x+4)-(5x+1)=5x+20-5x-1=19[/tex]
