Using Completing the Square to derive the Quadratic Formula
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YouTubeLee Guffick
Using Completing the Square to derive the Quadratic Formula
In this lesson, Lee Guffick derives the quadratic formula step-by-step by completing the square on the general quadratic 𝑎 𝑥 2 + 𝑏 𝑥 + 𝑐 = 0 ax 2 +bx+c=0. Perfect revision for GCSE Grade 9 and A-Level students who want to understand where the formula comes from, not just how to use it. Lee shows the clean algebraic pathway ...
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