Solve for the range of kkk such that x2+kx+1=0x^2 + kx + 1 = 0x2+kx+1=0 has no real roots.
∣k∣<2|k| < 2∣k∣<2
∣k∣>2|k| > 2∣k∣>2
k=2k = 2k=2
k>0k > 0k>0