Quadratic Roots
Class 10 Maths: quadratic equations (nature of roots)
Change a, b and c in y = ax² + bx + c. Watch the parabola move and see how the discriminant tells the number of roots.
Words to know
- Quadratic
- A polynomial of degree 2, like ax² + bx + c.
- Root
- A value of x that makes the quadratic equal to zero.
- Discriminant
- D = b² − 4ac; it tells how many real roots there are.
- Parabola
- The U-shaped graph of a quadratic.
Quick check
Answer 3 questions to check what you learned.
Try at home
Throw a ball gently across a room and watch its path: it is a parabola. Where does it start and land? Those are like the roots.