x=-1 problem x(7-x)+7 How is this problem written? -1(7--1)+7 or -1(7-1)+7

Question

First ever doing this kind of problem.

Answer 1

Hi Christopher!  When substituting -1 for x, you'll be placing it into the equation as is, meaning that it would be written as -1(7-(-1))+7. However, since there are two negatives right next to one another that create a positive, it can also be written as -1(7+1)+7.