Respuesta :
Answer:
Answer is 7.
Step-by-step explanation:
(a + 2)^4- 20(a + 2)^2+ 64 = 0
2a^4- 20(2a)^2+ 64 = 0
16a-20(4a)+64=0
-4a -64 -4a -64
12a-84=0
+84 +84
12a=84
84/12=7
The answer is 7
If needed to be solved to show proof text me
If needed to be solved to show proof text me