Jump to content
Sign in to follow this  

K value

Recommended Posts


Can you please explain how I could possibly find the k value of kx+ 3x +1= 0, with exactly one solution. 


Theory: a quadratic of the form ax2 + bx + c = 0 will have exactly one solution when the discriminant is equal to zero, i.e. Δ = b2 - 4ac = 0


So now you just have to plug the numbers into the equations in the theory above. Because your equation is kx2 + 3x + 1 = 0, then a = k, and b = 3, and c = 1. Hence, the discriminant is Δ = 32 - 4(k)(1) = 9 - 4k = 0. Thus 9 = 4k, which means that k = 9/4

  • Like 1

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.