Hi

I'm having trouble finding the roots of the equation below. While I have the final answer, I'm not sure how to arrive at that step-by-step. Any help would be appreciated.

x^2 + (z ln z - zb)x - (z^2 * b * ln z) = 0

The final answer has 2 roots in terms of 3 variables: x, b, z

Thanks in advance.