Exactly what are u chatting about this's just the sum from the roots is -b/a that is 21 as well as the product or service from the roots is 91 (-d/a) which u can remedy and form an equation to acquire alpha or beta then come across one other a https://case-study-solution10080.sharebyblog.com/35603766/new-step-by-step-map-for-case-study-analysis