Tolong jawab pertanyaan yang dilingkar

^ tanda pangkat
2^(n+2) - 2^(n+1)
-----------------------
2^n - 2^(n+1)

2^n.2² - 2^n.2¹
---------------------
2^n - 2^n.2¹

2^n.4 - 2^n.2
-------------------
2^n - 2^n.2

2^n(4 - 2)
--------------
2^n(1 - 2)

(4-2)/(1-2)
= 2/-1
= -2