Question

f x= 5 is a root of equation kx2

-14x-5=0 then find the value of k by completing the

following activity.

Sol :- One of the roots of equation kx2

-14x-5=0 is

Now let x= in the equation

K

2

- 14 - 5 =0

25k- 70- 5 = 0

25k- =0

25k =

K = = 3​

Answer 1

Answer:

Step-by-step explanation:

Given,

x=5 is one of the root of the equation kx 2 −14x−5=0

then, it should satisfy the equation, k(5)2 −14(5)−5=0

⇒k=  14(5)+5 /5*5

​ ∴k= 75/25

​  =3