SOLUTION: For what value of B does the function f(x) = -3x^2+Bx-4 Have only 1 x-intercept? Find all possible values of B and leave your answer in exact form.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: For what value of B does the function f(x) = -3x^2+Bx-4 Have only 1 x-intercept? Find all possible values of B and leave your answer in exact form.       Log On


   

Question 986740: For what value of B does the function
f(x) = -3x^2+Bx-4
Have only 1 x-intercept? Find all possible values of B and leave your answer in exact form.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


In order for to have one zero with a multiplicity of two, the discriminant, must be equal to zero. So solve

John

My calculator said it, I believe it, that settles it