Determine the range of mmm for which x2+mx+4=0x^2 + mx + 4 = 0x2+mx+4=0 has no real solutions.
m>4m > 4m>4 or m<−4m < -4m<−4
−4<m<4-4 < m < 4−4<m<4
m=4m = 4m=4
m≥4m \geq 4m≥4