Question

01
Find k so that eq. x² + kx+1=0 has real roots​

Answer 1

Step-by-step explanation:

for real roots , b²–4ac≥0

k²–4≥0

k²≥4

therefore k έ (–∞,–2] U [2,∞)

or k can have any real value but not between -2 and 2