Answer:
(x^3 + 6x^2) / (80x + 64)
Last option
Step-by-step explanation:
Top:
1/8 + (x+4)/(16)
= 2/16 + (x+4)/(16)
=(2+x+4)/16
=(x + 6)/16
Bottom:
(x+4)/x^2 + 4/x
= (x+4)/x^2 + 4x/x^2
=(x + 4 + 4x)/x^2
= (5x+4) / x^2
So now you have:
(x + 6)/16 / (5x+4) / x^2
= (x + 6)/16 * x^2 / (5x+4)
= (x^3 + 6x^2) / (80x + 64)
Answer is the last one
