How to Find Parabola Equation using Intercept Form (Root Factored Form) Formula & 2 Examples (IGCSE)
Автор: Radford Mathematics
Загружено: 2026-03-19
Просмотров: 15
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Need to find the equation of a parabola but only have the x-intercepts? In this lesson, we dive deep into the Intercept Form (also known as the Root Factored Form) of a quadratic equation.
Whether you are studying for IGCSE Extended Mathematics or IB Mathematics (SL/HL), understanding how to manipulate the formula y=a(x−p)(x−q) is essential for your exams.
In this video, you will learn:
The Intercept Form Formula: A breakdown of what p, q, and a actually represent.
Example 1: How to find the equation using two x-intercepts and a third coordinate point to solve for the leading coefficient (a).
Example 2 (The Shortcut): A special case look at parabolas where the leading coefficient (a) is equal to 1, meaning you only need the intercepts to find the final equation.
00:00 : Introduction to Intercept Formula and Example 1
02:15 : Example 1 Solution
08:18 : Example 2
13:16 : Conclusion
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