Determine the range of kkk for which x2+kx+1=0x^2 + kx + 1 = 0x2+kx+1=0 has no real roots.
k>2k > 2k>2
−2<k<2-2 < k < 2−2<k<2
k<−2k < -2k<−2
k>1k > 1k>1