Overview
A quadratic equation is an equation of degree 2.
Standard Form
ax² + bx + c = 0 (where a ≠ 0)
Methods (Basic)
- Factorization
- Quadratic formula
- Completing the square (later)
Example (Factorization)
Solve: x² - 5x + 6 = 0
Factor: (x − 2)(x − 3) = 0
So, x = 2 or x = 3
Key Points
- Solutions are also called roots.
- Quadratic equation can have 2, 1, or 0 real roots.