Find the range of mmm for which x2+mx+1=0x^2 + mx + 1 = 0x2+mx+1=0 has no real solutions.
−2<m<2-2 < m < 2−2<m<2
m<−2m < -2m<−2 or m>2m > 2m>2
m=2m = 2m=2
m>0m > 0m>0