Quadratic equations are basic to algebra and are the math behind parabolas, projectiles, satellite dishes and the golden ratio.

Module 6 (M6) – Algebra - Graphs of quadratic functions Part of Maths M6: Algebra Save to My Bitesize Save to My Bitesize Saving Saved Removing Remove from My Bitesize ...

Many former algebra students have painful memories of struggling to memorize the quadratic formula. A new way to derive it, overlooked for 4,000 years, is so simple it eliminates the need.

Solving that yields 2 2 – u 2 = –5 or u 2 = 9, so u = 3 works. The two solutions to this quadratic equation are 2 – u and 2 + u , or –1 and 5 . In other words, this parabola intersects the ...

Module 6 (M6) – Algebra - Graphs of quadratic functions Part of Maths M6: Algebra Save to My Bitesize Save to My Bitesize Saving Saved Removing Remove from My Bitesize ...