MCCW Network Forums

Remake
In the video, it does not use nCr because its not M2 education, well we can look at the formula below P.S. However, when the formula becomes (a-b)^n ,the b is now -b
while it is affacted by the power k, so it will becomes (item)-(item)+(item)-(item)
References:
https://ncalculators.com/algebra/a-b-n- ... ansion.htm