The solving for the first one should be like this
[tex]2x+y-5/sqrt 2^2 1^2=2x+y-5/sqrt5 [/tex]
And the next part [tex]3x-2y+6/sqrt 3^2 -2^2=3x-2y+6/sqrt13 [/tex]
After these manipulations just multiply them
[tex]
(2sqrt13-3sqrt5)x+(sqrt13+2sqrt5) y-5sqrt13-6sqrt5=0
[/tex]
And finally you need to square and simplify for the completed answer
