If x = 1 is a root of equation x2 - Kx + 5 = 0 then value of K is
4
6
-6
5
The least value of k which makes the roots of the equation
x2+5x+k=0imaginary is
Question 4 If 12 is a root of equation x2+kx−54=0, then the value of k is (A) 2 (B) –2 (C) 14 (D) 12