title: Genetic Algorithm with PyGAD
body: <p>I'm trying to make a genetic algorithm with PyGAD to find the best value that maximize this function: <code>Z = (3*(x^2 - y)^2 + (100 - x)^2) + (y- x) </code>, x and y between [-4, 4].</p>
  <p>Could someone send me an example of something similar to this function? The example I found uses a function with inputs that have already been given: <code>y = f(w1:w6) = w1x1 + w2x2 + w3x3 + w4x4 + w5x5 + 6wx6</code></p>
  <p>I don't know how i can get the fitness value to each individual using the function with two variables</p>