So you always want to pull out the gcf first but since there isn't one, we can move on. so we can make an acb chart which is multiplying the a value and the c value and find factors that of that product that will equal the b value. a value is 2 c value is -15 b value is 7 -30 factors to equal 7 = 10, -3 10 - 3 = 7 so the factors 10 and -3 work. so now you make 2 separate parenthesis with one of the factors and one x. and it should be set equal to 0. (x+10)(x-3) = 0 now solve for x in each separate parenthesis. x = -10 x = 3 those r the roots hope this helps
