"to decide this question" is correct and can be used in written English.
You can use it when you want someone to come to a decision about a particular issue or topic. For example, "The jury retired to consider the evidence and to decide this question of guilt or innocence."
To decide this question, shouldn't there be a public debate?
"Judge Bates is at pains not to decide this question for other circumstances.
We granted the petitions for certiorari in significant part in order to decide this question.
Like the Lucas Nursery court, we, too, do not need to decide this question in this case.
It is often very difficult to decide this question, because knowledge of human beings is insufficient or because the dramatist himself has not provided enough clues.
A full court needs to decide this question and we expect this case will be re-heard when a new justice is confirmed".
And, if so, the effect of the action of the state Legislature in passing the statute was to decide this debatable question against the view now advanced by appellant; and since we are unable to say that such a determination by the Legislature is clearly unfounded, we are precluded from overturning it.
Despite growing awareness about the problems of unreliable witness identification, questionable forensic evidence and inadequate legal representation of indigent defendants, the Supreme Court has repeatedly declined to decide this basic question — even though some 115 prisoners have been exonerated from death row since 1989.
"But we don't need 1,000 days to decide this crucial question.
The Supreme Court may have a chance to decide this important question very soon.
I can't explain why I was so passionate at seven to decide this all important question.
