Question

Find the values of k for which xsquare +5kx +16 has no real roots

Answer 1

=>xsq+5kx+16=0

By discriminant formula,

=>Bsquare-4ac=0

=>5ksquare-4*1*16=0

=>25ksq-64=0

=>25ksq=64

=>Ksquare=64/25

=>K=(64/25)square

=>K=8/5