Math Is Fun Forum

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Find Value of k

Find k such that the equation kx^2 + x + k = 0.

Let me see.

The discriminant is b^2 - 4ac

Let b = 1

Let a = k

Let c = k

(1)^2 - 4k + k = 0

Solving for k, I get 1/3.

Is this correct?

amnkb

Member

Registered: 2023-09-19

Posts: 253

Re: Find Value of k

Find k such that the equation kx^2 + x + k = 0.

Just answer the questions posted and keep your text math-related.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Find Value of k

hi amnkb

Yes, I did that too. But it doesn't tell what k is.  There must be more to this question surely. eg. If x has a single solution what is k?

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

amnkb

Member

Registered: 2023-09-19

Posts: 253

Re: Find Value of k

hi amnkb

Yes, I did that too. But it doesn't tell what k is.  There must be more to this question

i agree

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Re: Find Value of k

Find k such that the equation kx^2 + x + k = 0.

Just answer the questions posted and keep your text math-related.

This does not lead to the value of k. I think the discriminant is needed here to find k. What else can it be?

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Re: Find Value of k

hi amnkb

Yes, I did that too. But it doesn't tell what k is.  There must be more to this question

i agree

The question has been presented as found in the textbook. I don't think I'm wrong about using the discriminant to find k.

amnkb

Member

Registered: 2023-09-19

Posts: 253

Re: Find Value of k

Find k such that the equation kx^2 + x + k = 0.

Just answer the questions posted and keep your text math-related.

bob- heres the rest of the question-->

https://www.gauthmath.com/solution/1781 … are-Use-a-

solo- sorry

Last edited by amnkb (2023-11-16 19:12:31)

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Re: Find Value of k

Find k such that the equation kx^2 + x + k = 0.

Just answer the questions posted and keep your text math-related.

bob- heres the rest of the question-->

https://www.gauthmath.com/solution/1781 … are-Use-a-

solo- sorry

You got it right. Thank you.