What exactly are u chatting about it's just the sum with the roots is -b/a that is 21 and the product of your roots is 91 (-d/a) which u can fix and type an equation to have alpha or beta then discover another one particular then u possess the roots. https://case-solution50563.thezenweb.com/the-definitive-guide-to-case-study-writing-help-73913842