the task: Simplify. Write each as a single power. Do not evaluate.
(-Q)^2 (-Q)^5 (-Q)
my final answer would be = -Q^8
but I got the answer, that -Q^8 is not the final answer for this task.
It should be = -Q^8 = (-1*Q)^8 = (-1)^8 Q^8 = Q^8
Could somebody explain why?