Solution :
[tex]x^2 - 13x - 18 = 0[/tex]
Now, simplifying the given equation :
[tex]x^2 - 2( 6.5) (x) + (6.5)^2 -60.25 = 0\\\\( x - 6.5)^2 = 60.25[/tex]( Using, (a+b)² = a² + 2ab + b² )
Therefore, the simplification of given equation is :
[tex]( x - 6.5)^2 = 60.25[/tex]
