Question

find the value of k for which the given equation has real and equal roots ,x²+k+4=0 ,x²-(2k+1)x+12=0 ,kx²-4x+k=0

Answer 1

1)b^2-4ad=0
k^2-4(1)(4)=0
k^2-16=0
k^2=16
k=4