The fraction 8/21 cannot be simplified because the numerator and denominator don't have a common factor except 1.
The answer would be x^2-18x+81. This can be found be writing "(x-9)^2" twice, and distributing. Combine like terms, and you should get this answer.
Well it is definately not c haha. I would say 3 because it is a pretty even chance of getting three.
You have to put the number under 1 so you would get 1 over -27
