Question

find the value of x^2+4x+(k+2)=0 has roots are equal​

Answer 1

Step-by-step explanation:

x

2

−4x+k=0 is of the form ax

2

+bx+c=0 where a=1b=−4c=k

Roots are equal⇒ Discriminant=0

⇒b

2

−4ac=0

⇒(−4)

2

−4×1×k=0

⇒16−4k=0

⇒−4k=−16

∴k=

4

16

=4