Respuesta :

Answer:

I think the answer is 4/3

Step-by-step explanation:

I just substitute

Area =length x width

Area=3X^2-4X(4X^2+5X)

12X^4+15X^3-16X^3-20X^2

12X^4-X^3-20X^2

X^2(12X^2-X-20)