Question

The roots of x+kx+k=0 Are real and equal,​

Answer 1

Answer:

ans. k=4

Step-by-step explanation:

if roots are real and equal

D=0

b^2 -4ac = 0

a = 1, b = k, c = 1

k^2 - 4×1×1 = 0

k^2 - 4 = 0

k^2 = 4

k = √4

k = -+2

k = 2 ,k = -2

Answer 2

Given x

2

+kx+k

roots are real & equal

∴b

2

−4ac=0

=(k)

2

−4(1)(k)=0

=k

2

−4k=0

=k(k−4)=0

∴ k = 0 or k = 4