Jawapan

  • Pengguna Brainly
2016-02-21T22:37:22+08:00
x2-2k(x+3)=6x+2
x^2 - 2kx - 6k - 6x - 2 = 0
x^2 - (2k + 6)x - 6k - 2 = 0
a = 1 , b = - (2k + 6) , c = - 6k - 2
b^2 - 4ac = 0
(-2k - 6)^2 - 4(1)(-6k-2) = 0
4k^2 + 36 - 4(-6k - 2) = 0
4k^2 + 36 + 24k + 8 = 0
4k^2 + 24k + 44 = 0
k = - 3
1 5 1