Advanced Concepts in Quadratic Functions
This page covers advanced topics related to quadratic functions, focusing on the factored form and its relationship to roots. It provides a comprehensive summary of the conditions for roots and their calculations.
Key points discussed on this page include:
- The factored form of a quadratic function: y = a(x - x₁)(x - x₂)
- Special cases of the factored form when Δ = 0: y = a(x - x₀)²
- The relationship between the discriminant and the number of roots
Definition: The factored form of a quadratic function is y = a(x - x₁)(x - x₂), where x₁ and x₂ are the roots of the function.
The page reiterates the general form of a quadratic function (y = ax² + bx + c) and provides formulas for calculating roots in different scenarios:
- When Δ > 0: x₁,₂ = (-b ± √Δ) / (2a)
- When Δ = 0: x₀ = -b / (2a)
Highlight: The factored form of a quadratic function exists only when Δ ≥ 0, i.e., when the function has real roots.
Example: For a quadratic function with Δ = 0, the factored form becomes y = a(x - x₀)², where x₀ is the double root.
This page consolidates the knowledge about quadratic functions, providing a comprehensive overview of their forms, roots, and the crucial role of the discriminant in determining their behavior.