Determine the set of values for kkk such that x2+kx+9>0x^2 + kx + 9 > 0x2+kx+9>0 for all real xxx.
k>6k > 6k>6
k<−6k < -6k<−6
−6<k<6-6 < k < 6−6<k<6
k>0k > 0k>0