Is this problem correct....?

I used ((Factoring, Completing the square, Quadratic Formula, and find the roots.))

Problem :: x^2-3x-10=0

Answers;;

Factoring= (x-5), (x+2)

Completing the square= (x-3/4)^2 -49/4

Quadratic formula= (5,-2)

Find the roots= (5,-2)

My question also asked to put it in (square root) "simplest radical form"

which of my answers is in that form im not too sure but i have a basic idea, i think....