Respuesta :

Answer:

12x^2 + 4x

Step-by-step explanation:

The area of the blue is

A = l*w

A = 3x*4x = 12x^2

The area of the pink is

A = l*w

A = 1*4x = 4x

Add  them together

A total = 12x^2 + 4x

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