Knoji Tuition on Instagram: "Mini Maths Lesson: Proving Real Roots Using the Discriminant In this problem, we’re proving a polynomial always has real roots by applying the discriminant: D = b² − 4ac But instead of solving the quadratic directly, we focus on showing algebraically that the discriminant is always ≥ 0, no matter the value of the pronumeral (or under defined conditions). 🧠 This is a common technique used to prove something will always have real solutions. You might be asked to expan