Answer:
x = ± 2i
Step-by-step explanation:
note that = i
x² = - 12 ( take square root of both sides )
x = ± = ± = ± 2i
Answer:
B:
Step-by-step explanation:
1. Substitute for c:
2. Solve substitution:
3. Compare to calculated answers when
4. when is
Answer:
b
Step-by-step explanation:
The function is decreasing on the interval (- infinity, + infinity).
Answer:
0.28
Step-by-step explanation: