মূলদ্বয় $-2, -3$ হলে—

• a$x^2 + 5x + 6 = 0$
• b$x^2 - 5x + 6 = 0$
• c$x^2 - 5x - 6 = 0$
• d$x^2 + 5x - 6 = 0$