Question

How do you FOIL `(7q + 2)(7q - 2)`?

Answer 1

First : `7q*7q`
Outside : `7q*(-2)`
Inside : `2*7q`
Last : `2*(-2)`

`(7q*7q)+7q*(-2)+2*7q+2*(-2)`

Multiply inside each term:

`49q^2-14q+14q-4`

Terms `-14q` and `14q` cancel out

`49q^2-4`