Question

Find the value(s) of k, for which the roots of the equation

+ − =

are real and equal.​

Answer 1

Answer:

Correct option is

A

True

⇒ Given quadratic equation is kx

2

−2

5

x+4=0, comparing it with ax

2

+bx+c=0.

⇒ We get, a=k,b=−2

5

and c=4

⇒ It is given that roots are real and equal.

∴ b

2

−4ac=0

⇒ (−2

5

)

2

−4(k)(4)=0

⇒ 20−16k=0

⇒ 16k=20

⇒ k=

16

20

⇒ k=

4

5

∴ Given value of k is correct.

Answer 2

Answer:

lol

Step-by-step explanation:

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