Write the product as a trinomial.

(m + 2)(m – 7)

a: m2 – 14

b: m2 + 5m – 14

c: m2 – 5m + 14

d: m2 – 5m – 14

D. m2 - 5 - 14
you foil it out
First: muliply the two m's to get m2
Inside: muliply the first m with the -7 to get -7m
Outside: multiply the 2 and the second m to get +2m
Last: multiply the 2 and the - 7 to get -14
then: add the - 7 and the + 2 to get - 5
(m2 - 5 - 14)

If you have a number line with two points opposite from each other on a number line, the middle is always going to be 0.  Therefore both point are the same distance away from 0 just in opposite directions.  That means point q is always going to equal the negative of point p.  An example of this is if point p equals 5, point p equals -5.
Note that this method only works when it is specifically stated that the two points are opposite from each other.

I hope this helps.