Question

how do i expand (1-2a)^5?

Answer 1

you can use pascal's triangle

Answer 2

or binomial theorem

Answer 3

or straight up multiply which will be really long since you would have to do (1-2a)(1-2a)(1-2a)(1-2a)(1-2a)

Answer 4

I prefer pascal's triangle

Answer 5

just go to the (5+1)th row

Answer 6

could you show me how to use the pascal triangle?