Warning,
There is a guest on the forum at present who is constantly publishing one line answers.
Most look superficially possible but are completely wrong.
If you cannot make sence of a short answer maybe he/she is the one who has answered you.
What Melody said.....an answerer should show his/her work !!!!
Just providing "answers" without explanation is usually worthless....
There is truth to that Chris ,
although I strongly believe that a teaching part answer is better than a full answer.
However I was offering a genuine warning.
There is a guest who is putting up incorrect short answers, presumably on purpose.
The answer is 2.
No, the answer is 3.
Are you sure
I thought it was 28-x
Really? I thought it was 4
really i thought it was 983989824982984984