Question

Let 3x^2+kx+4. determine all values of k such that the quadratic equation f(x) =0 has one real root

Answer 1

//I'll use the discriminant rule for this.
b^2 - 4ac = 0 when one real root

Therefore, k^2 - 4*3*4= 0
k^2 = 48
k= +-4√3