Respuesta :

Total area = area of the blue square + 2 ara of the red rectangles

Area of a square = lenght x lenght = x * x = x^2

Area of a rectangle = Lenght x width = x * 2 = 2x

Total area = x^2 + 2 (2x) = x^2 +4x

We can write the area of the blue square as x^2