The increasing interval of the function y = - (x-3) multiplied by the absolute value of X

The increasing interval of the function y = - (x-3) multiplied by the absolute value of X

The first method is to draw a graph and make its function image. Note that the drawing is divided into two steps: the first step is to make the image of the square of y = (x-3) x = x-3x; the second step is to turn the image of the upper quadratic function below the x-axis over the x-axis