Compute all real solutions to 16x + 4x+1 - 96 = 0	Pick
A) 3 / 2
B) 3 / 3
C) 2 / 4
D) 4 / 4
E) 4 / 5

Rationale: if we substitute y = 4 x , we have y 2 + 4 y - 96 = 0 , so y = - 4 or y = 8 . the first does not map to a real solution , while the second maps to x = 3 / 2 correct answer a
Answer: A