Question

the sum of a product (-2)+(-2)+(-2)+(-2)

Answer 1

The answer is -8 because you just add up the values by doing normal addition. 

Hope this helps :)

Answer 2

-8 because a positive and a negative make a negative. So if you pass out the + to all the (-2)'s it will be -2+-2+-2+-2, which is equivalent to -2-2-2-2.