If x = 2 is a root of equation x2 + 3x - k = 0 then value of k is
7
12
10
8
If x = 1 is a root of equation x2 - Kx + 5 = 0 then value of K is
If 8 is a root of the equation x2 - 10x + k = 0, then the value of k is: