4x+1/5 I hope this helps! I'm hoping google translated your question properly, I'm native english speaking ¡Espero que esto ayude! Espero que google tradujera tu pregunta correctamente, soy nativo de habla inglesa
Well, what I would do [not sure if it's the correct way], is use the white area as a sector of a circle. The top right of the box is the center of the circle, so the radius is 6. Then, by the white portion being one quarter of the circle (90° out of 360°), I could calculate the that pink shaded region = the total square (6×6) minus the white sector. So area (A) of white sector (s): A(s) = 1/4×pi×r^2 36 - 28.27 = 7.73