Question

if x = 3 one root of the quadratic equation X square - 2 k - 6 = 0 then find the value of k

Answer 1

Hey !!


X = 3



P ( x ) = X² - 2K - 6




P (3) = (3)² - 2 K - 6



=> 9 - 2K - 6 = 0



=> -2K = -3



=> K = 3/2