Question

How do you FOIL `(2y - 5)(y + 9)`?

Answer 1

=`2y^2+13y-45`

To foil `(2y-5)(y+9)` you first `2yxxy` and `2yxx9` and `-5xxy` and `-5xx9`

giving `2y^2 + 18y -5y -45`

simplified=`2y^2+13y-45`