in expansion such as (a-b)5 how do we know which term should be taken as positive or negetive - Maths - Binomial Theorem

Question

in expansion such as (a-b)5 how do we know which term
should be taken as positive or negetive?

Lokesh · Accepted Answer

No need to remeber whether the term is positive or negative Take
just (- b) and its power then if the power is even then negative
sign will remove, thus term will be positive and if it is odd the
term will be negative
CHEERS!

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