Determine the roots of the equations, use any method (complete sq, factor, quad. formula) :

A) $\displaystyle 50x^2-2x-77=0$

I came up with the below using the quadratic formula. Just need to know how to get it to its simplest form.

$\displaystyle (2+{\sqrt{15404}})/(100)$

B)$\displaystyle (x-1/x+4) - (x/x-3) = 9$

$\displaystyle (x-1)(x-3)-(x)(x+4) = 9(x+4)(x-3)$

$\displaystyle (x^2-4x+3)-(x^2+4x) = 9(x^2+x-12)$

$\displaystyle (x^2-4x+3)-(x^2+4x) = (9x^2+9x-108)$

New Equation: $\displaystyle 9x^2+9x-111 = 0$ ?

If somone could check if i did the algebra right for the new equation i would be thankfull.