52. You are given the following system of equations: y=x²
rx + sy = 1
where r, s, and t are integers. For which of the following
will there be more than one (x, y) solution, with
real-number coordinates, for the system?
F. p^2 + 4st > 0
G. s^2 - 4rt > 0
H. r^2 - 4st < 0
J. s^2 - 4rt < 0
K. s^2+ 4rt < 0