Question

The value of k for which
2.x2 - kx + x + 8 = 0 has equal and real
roots are​

Answer 1

If the given equation has real roots, a = 2 , b = -k and  c = 8.

∴ D = 0

b^2 - 4ac = 0

(-k)^2 - 4 * 2 *8 = 0

k^2 = 64  

k = ± √64

∴ k = ± 8.

Hope This Helps :)

Answer 2

2 . x2 -kx + 8 = 0
4x -kx + 8 =0
(4-k)x = -8
X = 8/4-k
X-k = 8/4
X- k = 2
-K = 2-x
K = -2+x
Therefore k = x - 2 //