Question

How do you multiply `(p-10)^2`?

Answer 1

`p^2 - 20p + 100`

Explanation:

Rewrite as

`(p-10)(p-10)`

Foil the bracket:

`p*p - 10p - 10p + 100`

`therefore p^2 - 20p + 100`

You could also do it with Pascal's triangle/Binomial theorem but for an exponent of 2 that's fairly unnecessary.