What are the zeros of the quadratic function fx=6x2+12x-7 ? x=-1- square root of 13/6 and x=-1+ square root of 13/6 x=-1-frac 2 square root of 3 and x=-1+frac 2 square root of 3 x=-1- square root of 7/6 and x=-1+ square root of 7/6 x=-1-frac 1 square root of 6 and x=-1+frac 1 square root of 6