Question

If f(z) is a regular function of z, prove that $\lgroup \frac{\partial^2}{\partial x^2} +\frac{\partial^2}{\partial y^2} \rgroup |f(z)|^2 = 4|f'(z)|^2$

Answer 1

I don't understand your question

Answer 2

Answer:

this is the required solution

Step-by-step explanation: