If point P [x, y], XY is less than 0 and X + y is greater than 0, then the position of point P in the coordinate plane

If point P [x, y], XY is less than 0 and X + y is greater than 0, then the position of point P in the coordinate plane

First, let's make the line L: y = - x, and point P is in the area between the positive half axis of the line L and the Y axis, and the area between the positive half axis of the line L and the X axis