Hi,

I'm happy enough expanding easy binomial questions, e.g. Expanding $\displaystyle (x + 2)^7$

I have a query though about something the teacher said today that I was hoping if somebody could tell me why you would need to do what they said;

"If you have the x term on the left, e.g $\displaystyle (2x + 1)^6$ or $\displaystyle (\frac{1}{x} - 5)^{12}$ always move it to the right, so those would become $\displaystyle (1 + 2x)^6$ and $\displaystyle (-5 + \frac{1}{x})^{12}$"

As far as I can see, wouldn't you get the same answer either way?

Thanks in advance for any help, I'm interested to know why this would be necessary and in which cases would it give a different answer?