Jawapan

  • Pengguna Brainly
2016-02-21T22:30:36+08:00
x^2 +2kx-k=0
a = 1 , b = 2k , c = - k
b^2 - 4ac = 0
(2k)^2 - 4 (1)(-k) = 0
4k^2 - 4(-k) = 0
4k^2 + 4k = 0
k= 0 , k = - 1
1 5 1