Step-by-step explanation:

Answer:
100 is the answer
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Step-by-step explanation:
x^2 -2kx +7k -12 = 0
two equal roots -->Δ = b^2 -4ac = 4k^2 - 4(7k-12)=0 = 4(k^2 - 7k +12)=4(k-4)(k-3)=0
so k =3 and k =4