what is the constant term in
I see you have graph paper.
You must be plotting something
In mathematics, you don't understand things. You just get used to them.
I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.
You need to calculate the coefficent where the z term is (z to the power zero).
That will be
So 9C3 x 2^6
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei