+ 7(-1)^2 + 8(-1) + 2. This is equal to 0. Therefore x=(-1), which is to say x+1, is a factor, and -1 is a root of x^3 + 7x^2 + 8x + 2. The next two roots can be found by algebraically dividing x^3 + 7x^2 + 8x + 2