Question

if 1 by 2 is a root of the equation X square + X - 1 by 4 equal to zero then the value of k

Answer 1

p(x)   = x² + kx -(1/4) =0
p(1/2) = (1/2)²+ k(1/2) - (1/4) = 0
          = (1/4) + (k/2) -1/4 = 0
           = k/2 = 0
           =  k =0