Answer:
A. sigma 24 r=0 (24, r) (5m)^24-r (-6n)^r
Step-by-step explanation:
This is called Binomial Theorem (p. 632 in pre-calculus textbook)
Instead of using nCr, the replace it with ()
The expression is (5m-6n)^24
We can take out the parts
a = 5m
b = -6n
n = 24
and substitute it into the equation shown
