Answer: Expand (z+1)^5: 5z^4 + 10z^3 + 10z^2 + 5z^1 + 1

[andrey21]

I simply have to expand (z+1)^5

I think I have the solution I am just unsure about the signs:z^5 5z^4 10z^3 10z^2 5z^1 1 Is it alternate signs + - + - ...

 

[lanedance]

I think you meant (z-1)^5

but your signs sound correct, consider how many times each must be multiplied by (-1), eg the z term must be multiplied by (-1)^4 so is even

 

[andrey21]

Ye sorry I did mean (z-1)^5, if it was (z+1)^5 would that be the same expansion exceot the signs be all positive. Thanks